BULLS MONSTER E FS Review

2018 Bulls Monster E Fs Electric Bike Review
2018 Bulls Monster E Fs
2018 Bulls Monster E Fs Bosch Performance Line Cx Motor With Chain Guide
2018 Bulls Monster E Fs Bosch Powerpack 500 Ebike Battery
2018 Bulls Monster E Fs Handlebar Ergon Grips Remote Lockout Lever
2018 Bulls Monster E Fs Bosch Purion Compact Ebike Display
2018 Bulls Monster E Fs Schwalbe Jumbo Jim Fat Bike Tires
2018 Bulls Monster E Fs Magura Mt5 Hydraulic 180 Disc Brakes
2018 Bulls Monster E Fs 11 Speed Shimano Deore Xt Shadow Plus
2018 Bulls Monster E Fs Rockshox Monarch Rt 120 Rear Suspension
2018 Bulls Monster E Fs 4 Amp Bosch Ebike Charger
2018 Bulls Monster E Fs Electric Bike Review
2018 Bulls Monster E Fs
2018 Bulls Monster E Fs Bosch Performance Line Cx Motor With Chain Guide
2018 Bulls Monster E Fs Bosch Powerpack 500 Ebike Battery
2018 Bulls Monster E Fs Handlebar Ergon Grips Remote Lockout Lever
2018 Bulls Monster E Fs Bosch Purion Compact Ebike Display
2018 Bulls Monster E Fs Schwalbe Jumbo Jim Fat Bike Tires
2018 Bulls Monster E Fs Magura Mt5 Hydraulic 180 Disc Brakes
2018 Bulls Monster E Fs 11 Speed Shimano Deore Xt Shadow Plus
2018 Bulls Monster E Fs Rockshox Monarch Rt 120 Rear Suspension
2018 Bulls Monster E Fs 4 Amp Bosch Ebike Charger

Summary

  • Top of the line, full suspension, fat tire electric trail bike with RockShock Bluto and Monarch air, remote lockout for the fork, 11-speed Shimano Deore XT drivetrain with Shadow Plus clutch, robust skid plate and alloy drivetrain guides
  • High-torque Bosch Performance Line CX motor with eMTB drive mode, sand and snow capable if you lower the PSI on the Schwalbe Jumbo Jim tires, premium Magura MT5 hydraulic disc brakes with adjustable-reach levers
  • Relatively lightweight and well balanced, available in two frame sizes for improved fit, high-capacity 500 watt hour battery pack with 4-amp quick charger can be filled on or off the frame, ABUS battery core can be keyed-alike to locks
  • Basic pedals are easily bent and don't offer much surface area, no kickstand and no provisions to add one yourself aftermarket, Bosch Purion display is more basic and not removable, CX motor is louder and more power hungry

Video Review

Introduction

Make:

BULLS

Model:

MONSTER E FS

Price:

$5,499

Body Position:

Forward

Suggested Use:

Trail, Mountain, Sand and Snow

Electric Bike Class:

Pedal Assist (Class 1)
Learn more about Ebike classes

Warranty:

2 Years Motor and Battery, 5 Years Frame

Availability:

United States, Canada

Model Year:

20182019

Bicycle Details

Total Weight:

55.8 lbs (25.31 kg)

Battery Weight:

5.7 lbs (2.58 kg)

Motor Weight:

8.8 lbs (3.99 kg)

Frame Material:

7005 Aluminium

Frame Sizes:

18.11 in (45.99 cm)20.08 in (51 cm)

Geometry Measurements:

Medium 46 cm Measurements: 18.25" Seat Tube, 22.5" Reach, 29.5" Stand Over Height, 29.25" Width, 75.5" Length

Frame Types:

High-Step

Frame Colors:

Matte Black with Gloss Black and Silver Accents

Frame Fork Details:

Rock Shox Bluto RL Solo Air Suspension, 120 mm Travel, Remote Lockout, Rebound Adjust, 142 mm Hub Spacing, 15 mm Thru-Axle with Quick Release

Frame Rear Details:

RockShox Monarch RT High Volume Air Suspension, 120 mm Travel, Lockout, Rebound Adjust, 177 mm Hub Spacing, 12 mm Thru-Axle with Quick Release

Gearing Details:

11 Speed 1x11 Shimano Deore XT with Shadow Plus One-Way Clutch, CS-M8000-11 11-40 Tooth Casette

Shifter Details:

Shimano XT SL-M8000 Two-Way Triggers on Right

Cranks:

FSA, Alloy, 170 mm Length, 15 Tooth Chainring with Alloy Guard

Pedals:

Wellgo C288DU Alloy Platform, Cage Style

Headset:

Chin Haur, Sealed Cartridge, Threadless, Internal Cups, 1-1/8" to 1-1/2" Tapered

Stem:

Bulls, Alloy, 80 mm to 90 mm Length, 7-Degree Rise, 31.8 mm Clamp Diameter

Handlebar:

Bulls Branded, Alloy, Low-Rise, 720 mm Length, 25 mm Rise, 9-Degree Bend

Brake Details:

Magura MT5 Hydraulic Disc with 180 mm Rotors, MT-5 Four Piston Front Caliper MT-4 Two Piston Rear Caliper, Magura MT4 Levers with Adjustable Reach

Grips:

Ergon GA30, Flat Rubber, Locking, Black

Saddle:

Selle Royale Seta M1

Seat Post:

Bull Branded, Alloy

Seat Post Length:

350 mm

Seat Post Diameter:

30.9 mm

Rims:

Alloy, Single Wall, Punched Out Circular Holes, 32 Hole, 80 mm Width

Spokes:

Stainless Steel, 13 Gauge, Black

Tire Brand:

Schwalbe Jumbo Jim, 26" x 4" (100-559)

Wheel Sizes:

26 in (66.04cm)

Tire Details:

5 to 30 PSI, 0.4 to 2.0 BAR, Pace Star 3, Tubeless Easy Snakeskin, EVO Evolution

Tube Details:

Presta Valve

Accessories:

Sticker Slap Guard, Chain Tensioner with Narrow Wide Teeth, Alloy Skid Plate

Other:

Locking Removable Mid-Mounted Battery Pack, 1.7b lb 4 Amp Charger, Maximum 120 RPM Motor Support, ABUS Locking Core and Keys

Electronic Details

Motor Brand:

Bosch Performance Line CX

Motor Type:

Mid-Mounted Geared Motor
Learn more about Ebike motors

Motor Nominal Output:

350 watts

Motor Peak Output:

570 watts

Motor Torque:

75 Newton meters

Battery Voltage:

36 volts

Battery Amp Hours:

13.4 ah

Battery Watt Hours:

482.4 wh

Battery Chemistry:

Lithium-ion

Charge Time:

4.5 hours

Estimated Min Range:

25 miles (40 km)

Estimated Max Range:

70 miles (113 km)

Display Type:

Bosch Purion, Fixed, Backlit LCD Control Panel with Integrated Button Pad, (Hold - to Cycle Through Readouts, Hold - and Press Power to Change Units)

Readouts:

Speed, Assist Level (Eco, Tour, Sport, Turbo), Battery Level (1-5), Trip Distance, Total Distance, Estimated Range, Lights

Display Accessories:

Micro-USB Port for Diagnostics and Software Updates Only

Drive Mode:

Advanced Pedal Assist (Measures Wheel Speed, Pedal Cadence and Pedal Torque, Power Output Relative to Pedal Input: Eco 50% 40 Nm, Tour 120% 50 Nm, eMTB 120% - 300% 75 Nm, Turbo 300% 75 Nm)

Top Speed:

20 mph (32 kph)


Written Review

EBR charges a service fee to manufacturers to produce ebike reviews and videos. It’s the same flat fee for each bike, and it helps us to keep the site going while limiting ad clutter. We appreciate the opportunity to serve you with our opinions and data but respect your right to know that we receive compensation :)

The Monster E FS is one of the only full suspension, fat tire, electric trail bikes I have ever seen… aside from the Haibike SDURO Full FatSix, which uses a Yamaha mid-drive vs. Bosch. For the additional $300 here, you get a motor system with shift detection, higher RPM support (up to 120 pedal strokes per minute), and eMTB drive mode. It’s a product that hasn’t changed much since 2017, aside from using a different, more compact, display panel and moving towards an all-black paint job. This electric bike comes in two frame sizes, which is very impressive given the niche it fills, and I found it to be nimble and trail capable with 4″ wide tires vs. some of the heavier and slower 4.6″ and 4.9″ tires now rolling onto the scene. It’s a Class 1 product with a top assisted speed of 20 mph, so as to be legal on more mountain biking trails, but it’s also well-suited to sand and snow if you lower the tire pressure. One thing I really love about fat tire bicycles is how stable and comfortable they can be. With punched out rims to reduce weight, highly adjustable air suspension, and a sloping top tube, it’s practical and comfortable to mount. BULLS Couldn’t go quite as steep with their top tube because the Bosch Powerpack battery inserts down vs. from the side, and they didn’t have room for bottle cage bosses in this are either, but the split-pivot swing arm in the rear is designed to isolate lateral movement so the chain won’t buck or slip when the going gets bumpy. I really love the drivetrain on this electric bike because it’s a simpler, lighter, 1×11 setup than having multiple sprockets up front. When you combine the higher-end Shimano Deore XT derailleur with the Shadow Plus clutch, alloy chainring guard and surrounding guide-pully system above, it almost completely prevents chain drops as well as chain suck from below. Chain suck can sometimes be an issue with the smaller proprietary Bosch chainring in muddy environments when the chain isn’t as tight and there’s no riser pully… but it shouldn’t be an issue here. This is a purpose-built frame with excellent weight distribution, responsive power delivery, and plenty of braking power. If you’re actually going to ride in the snow, be sure to lower the tire PSI to ~5 (and consider converting the tires to tubeless), the flat grips will provide plenty of room for padded gloves and the adjustable-reach brake levers will be easier to grab and activate. This thing is not a novelty, it’s very capable and complete in my view. The only drawbacks are a higher price point, a somewhat limited display panel, a more exposed battery pack (compared to the new Powertube 500 from Bosch), limited cargo storage options, basic pedals, and no kickstand support.

Driving this beast is an internally geared mid-motor specifically designed for mountain biking applications. It’s the zippiest, most powerful, and heaviest Bosch ebike motor on the market, and it’s called the CX. Delivering up to 75 Newton meters of peak torque, it relies on three primary signals from the motor controller in order to activate. The system listens for rear wheel speed with a traditional magnet sensor on one of the spokes, pedal cadence, and pedal torque, over one-thousand times per second. Bosch designs sensors for all sorts of automotive equipment and smartphones like the iPhone, so the sensing technology here is something that really differentiates them. Even though this electric bicycle does not have a throttle, the higher levels of assist are so quick and fluid that it can almost feel like a throttle when starting out. As someone with knee sensitivity, I have come to appreciate this response when mountain biking because of my sensitive knee. This sort of performance does come at a price however, the battery will drain faster and there’s some electronic whirring noise that is demonstrated in the video review above. This motor weighs almost nine pounds, but at least the weight is positioned as low and centrally as it can be, and BULLS has designed an alloy skid plate to protect it from below. On the right side, a small 15 tooth sprocket spins 2.5 times for each crank arm revolution vs. using a one-to-one chainring. I have been told that this provides better chain grab and I suspect it allows for a greater mechanical advantage and more responsive starts and stops. When you’re navigating varied terrain, predictability is important. The responsive motor performance is balanced by large 180 mm hydraulic disc brakes from Magura with quad-piston front calipers that offer increased surface area for cooling and smoother stops. Coming back down to the bottom bracket, I appreciate the little alloy chainring cover, which will help pants slough away from the chain vs. getting greasy or snagged, and the chain guide riser pulley wheel that will keep it on track and clear debris. I feel like the drivetrain on this electric bike performs well and will withstand the rigors of different environments.

Powering the 2018 Monster E FS is a Bosch Powerpack 500. This is one of the lightest weight, high-capacity, electric bike batteries I have reviewed, and it’s also one of the most widely available. In addition to using the same case design and mounting interface as the older Powerpack 400 (which can also be used on this bike), it is backed by a two-year 1,000 cycle warranty and can be found at ebike shops all over the world. What this means is that you’ll be able to find a replacement more easily, or perhaps a second pack to extend or rides, or maybe rent or borrow a pack when traveling. Since high-capacity Lithium-ion batteries aren’t allowed on commercial flights, this could enable you to adventure to more places with YOUR bike vs. having to rent one on location. Compared to the new Powertube design, which is integrated into the downtube vs. attached on top of it, the Powerpack is more than a pound lighter (when you take into account the shielding below the Powertube), easier to remove for charing off-bike, and safer to carry around using the integrated loop handle. Since this is a heavier bike with big tires that produce more drag, suspension that can bob some of your pedaling efficiency away, and a power-hungry motor, it’s wonderful to have nearly half a kilowatt hour of capacity to burn through. And, refilling the pack is relatively quick with the included 4-Amp Bosch charger. Most electric bike chargers I have seen offer just 2-Amps of power flow and weigh at least 1.5 lbs. The Bosch charger weighs 1.7 lbs and is very compact. For those who need to reduce and save even more space, the company does offer a 1.1 lb 2-Amp travel charger. One of the main differences between the latest BULLS Monster and the 2017 version is that the display is smaller and does not have a Micro-USB power port. This could further extend the range of your battery, but it’s a trade-off with some consequences worth considering.

The display panel you get with the 2018 Monster is called Bosch Purion, and is mounted within reach of the left grip for easy reach while riding, without compromising your grip. It’s tough, relatively simple to use, and faintly backlit for easy use in darkness. Once the battery pack has been mounted and locked to the downtube (make sure you hear it click into place) just press the power button on the top edge of the Purion display and it will blink to life. The top area shows your speed in miles per hour or kilometers per hour (hold the minus key and tap power to switch between) and the bottom section shows your battery charge level. The charge indicator uses a 5-bar infographic with 20% jumps that leaves a bit to be desired in my opinion, but is relying more on amp hour flow vs. voltage to calculate, and thus does not bounce around as much as some less sophisticated products. A very similar 5-bar display is built into the Bosch Powerpack battery case, along the left side, and can be activated by pressing a little minus symbol button there. So, at least the two menus match and you can tell how full the pack is whether it’s mounted or not, but I would love to see Bosch move towards a battery percentage readout for more precision. In the center of the display, different trip menus can be accessed and explored by holding the minus button on the control pad. The main readout is assist level which includes Off, Eco, Trail, eMTB, and Turbo. Clicking plus or minus allows you to raise or lower support, and the eMTB mode is like a “do everything” mode that relies on pedal torque more than a set power band. It came in handy while test riding in sand and allowed me to focus and spend more attention and energy on balancing the bike and shifting gears. All Bosch CX motors get access to this eMTB setting, though older hardware may need a firmware update. It performs more consistently than actual strain sensors that I have tested, like the TMM4. So, the other menus in this center section are trip distance, total distance, and range. And you can access these by holding the minus key for a few seconds. Keep in mind, if you press plus or minus again, the readout will temporarily revert to assist level. Earlier, I complained about the 5-bar battery readout being less precise than it could be, but the range menu helps to make up for this. It’s one of the more advanced readouts that I have seen on any electric bike drive system and relies on the charge level, your last mile of ride performance, and the chosen level of assist to provide a very accurate estimate. Used thoughtfully, this menu will help you get there and back again without running out of juice… You might need to use lower levels of assist at times, but at least you’ll have the data to know when.

The Bulls Monster E Full Suspension electric fat bike is exciting, just looking at this thing gets my imagination going and it actually lives up to the visual presentation. The drivetrain is tough, the electronic systems are some of the most reliable and well-supported that I know of, and it offers enough power and precision to handle soft sand and snow. Super deep snow cannot be overcome by really any electric bike, this isn’t a snowmobile, but the added surface area and possibility for very low tire pressure gives you the best shot you can really ask for with a product like this. The motor kicks on so quickly, that it can feel like you have a throttle to work with, and that’s a deciding factor in soft terrain. While the 2018 model appeared to be 0.2 lbs heavier than 2017 and the display is smaller and not removable, many Bosch Certified dealers can help you upgrade to the larger Intuvia if you want. Many companies have switched to the smaller Purion to save money, look stealthier, and be tougher (especially on e-mountain bikes) but as a near-sighted rider, I like the intuvia, and it’s Micro-USB charging port to run my phone’s GPS. The punched out rims on this bike help to save weight and improve cushion, the chainring guard and pulley system will protect your snowpants, and the angled top tube will make mounting and stepping off into soft sand or snow a less painful experience for your crotch. And, the two frame size options really extend the experience here, for people of different sizes. I wish it had provisions to add a kickstand at the back end of the left chainstay, but I see why they didn’t include a stand stock… to reduce weight and rattling. Just be careful when laying this bike down, lay on the left side or lean against a wall by positioning the back tire against the wall with the bike angled out. Once you’ve had a fun ride and the bike is dry, use air pressure to dust it off or remove sand. After this, you can use a damp rag and some cleaning spray like this to wipe it down. The display, battery, and motor are all highly water resistant, but you wouldn’t want to submerge the bike or spray it hard with water. For reference, I reviewed the medium sized (smaller) frame which is 46 cm and have provided my own measurements in the stats section above. As always, I will do my best to answer comments below and you can connect directly with other owners and enthusiasts in the BULLS Ebike Forums. Big thanks to Bulls for partnering with me on this review and providing a couple of different models to compare, along with some staff to hang out with and go for a ride on the beach. It was an awesome experience, I have enjoyed watching them grow as a company over the past few years, and feel that their support and network of shops have done a great job providing a high level of customer service. One final note, you could add integrated lights to this system with the help of a shop and then hold the plus button on the display to turn them on/off and I love that they went with multi-shift triggers and a two-way high shifter to bring this up to the cross country and trail level. The rear suspension has a lockout lever and the front has a remote lockout so you can reduce bobbing and easily transition from hard packed to bumpy trail without hopping off.

Pros:

  • One of the only full suspension fat tire electric bikes I have seen, and it uses one of the best motor and battery systems available, Bosch CX with the Powerpack 500, and is available in two sizes for improved fit and ride comfort
  • The 2018 model has a more integrated color scheme, everything is black so the motor casing, battery box, and cables blend together
  • Schwalbe makes premium tires and these ones can be converted to tubeless to save weight and run at lower pressure, I love that the rims are punched out for weight savings and give
  • Premium drivetrain with eleven gears, a one-way clutch to keep the chain tight on rough terrain, an alloy chainring protector and sturdy alloy guide with narrow-wide sprocket so you should never struggle with drops, chain slip, or chain suck (which can sometimes happen in muddy conditions on the proprietary smaller Bosch chainrings)
  • Trail-ready 120 mm travel air suspension from RockShox with adjustable sag, rebound adjust, lockout, and remote lockout on the front, black anodized coating on the stanchions provides strength and improves sliding
  • The motor is positioned for maximum ground clearance but also has an alloy skid plate underneath for added protection if you have a rock strike
  • Both the motor and battery pack are positioned low and center on the frame, this improves handling, reduces unsprung weight compared to hub motors, and I feel that BULLS has done an excellent job blending both items into the tubing design of the frame so they look good
  • The cockpit is very clean and sturdy, you get locking Ergon grips and the compact Bosch Purion display panel, there’s plenty of room for the triggers and seat post dropper lever on the right and I like the low-rise bars for a more upright body position on cross country and trail terrain
  • Both wheels offer quick release, which combines with the removable battery to make this bike lighter and easier to transport, I always take the battery off when loading onto bike racks
  • The Powerpack 500 offers a lot of capacity in a compact, super lightweight package, the mount for this battery is backwards compatible with the older Powerpack 400 battery if you have one, I like that both packs have an integrated handle and can be found worldwide for easier renting or replacement
  • This Bosch charger is one lightest and fastest models around, offering 4 Amp output and weighing just 1.7 lbs, it doesn’t require any dongles to connect and charge the battery off or on the bike
  • The Bosch CX motor offers a lot of zip and torque, up to 75 Nm with nearly 570 watt max, it’s one of the most reliable mid-drive systems around and now features an eMTB mode with variable power output based on pedal torque… so you can leave the assist setting alone and focus on shifting gears and steering, this is particularly useful on soft terrain
  • It’s nice that Bulls designed this frame with a steeper top tube to lower stand over height because sometimes if you jump off into sand or snow, your feet could sink and you might rack yourself on a higher tube
  • These Ergon grips aren’t aren’t as thick as some of the other models, so you can wear gloves and still get a nice handle on them, the Magura brake levers offer adjustable reach which also suits gloves or people with longer/shorter fingers
  • Thru-axles on the front and rear wheels for maximum stiffness and strength, tapered head tube is also stronger and works with nicer forks like the Bluto here
  • The battery lock core is made by ABUS and comes with a code card so you can purchase locks “keyed-alike” and have fewer keys floating around causing confusion
  • Bosch designs all sorts of sensors and mechanical hardware for the automotive, home appliance, and tools categories and is one of the few companies to offer shift detection on their ebike motor systems, this is designed to protect the chain, cassette, and derailleur as you ride and shift gears and is especially relevant and useful with the high torque Performance Line motors like this
  • Walk-assist has been enabled on this ebike which means you can get help moving it forward if you get a flat tire or have to hop off on a particularly difficult or steep section of trail, just press the walk mode button at the base of the display and then hold the plus button when in any of the four levels of assist, switch gears to change walk speed

Cons:

  • The included pedals aren’t my favorite, they don’t offer as much surface area or durability as even cheap Wellgo pedals and you could upgrade to lightweight sealed magnesium platforms with adjustable pins without spending a lot, the stock pedals can get bent and become sharp over time when laying the bike on its side
  • There’s no kickstand included and I didn’t see provisions for adding one yourself aftermarket, this means the bike will always have to be leaned against walls or posts, so be careful with the disc brake rotor and derailleur on the rear portion of the bike because they are sensitive, always lean the bike onto its left side to protect the drivetrain
  • While the Bosch Purion display panel is less vulnerable, because it’s small, the screen isn’t as easy to read as the larger Bosch Purion and it isn’t removable, you get fewer menus and readouts and there’s no Micro USB port built in for charging (just for diagnostics), but some shops can help you upgrade to the Intuvia if you want it
  • Very few full suspension bikes come with front or rear racks, you could mount a seat post beam rack on this bike, but it could get bumped side to side, since there are no bottle cage bosses or other ways to easily transport gear, you might need a backpack or hydration pack
  • Since Bosch Performance Line motors use a smaller chainring and reduction gearing system to improve response time and chain retention, there is some friction when you pedal unpowered, the chainring spins 2.5x for each crank revolution but there is no drag when coasting
  • Since the seat tube has a bend halfway down, you cannot drop the seat post very far and might need to modify the post (by cutting with a hack saw and then sanding sharp edges) to get it to fit your leg length properly
  • The charging port for the battery (when mounted to the frame) is very close to the left crank arm and could get snagged or bent there… so be extra careful with the bike when charging, don’t walk it backwards because the cranks will turn
  • The Performance CX motor uses the most power and produces the most noise of any of Bosch’s current generation drive systems, thankfully the battery offers a lot of juice and the sound of those knobby tires mostly covers up the electronic whirring

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A speedy and almost luxury sporty commuter ebike from BULLS, highlighted by full features like a rear rack, battery integrated lights, comfortable and ergonomic touch-points, reliable electric and mechanical drivetrain, a responsive, agile and nimble ride, and a premium component feel. Driven by a lighter and more compact 4th generation Bosch Performance Line Speed mid-drive motor,…...

BULLS WILD FLOW EVO RS Review

  • MSRP: $5,999
  • MODEL YEAR: 2019, 2020

A light 42lb full suspension cross country electric mountain bike with premium blacked-out paint job and ALL accessories, comfortable carbon fiber main frame (alloy rear triangle), the battery and motor are built into one removable drivepack that can be swapped out for an optional storage cover so you can ride as an even lighter acoustic bike. High quality Fox air suspension front and rear, Boost hub spacing provides sturdy spoke bracing…...

BULLS ALPINE HAWK EVO Review

  • MSRP: $5,799
  • MODEL YEAR: 2020, 2021

One of the lightest electric bikes I've tested; carbon fiber frame, fork, and seat post reduce weight while dampening vibration for comfort; available in three sizes with matching crank arms, stem, and handlebar for optimal fit. Premium hydraulic disc brakes are easy to actuate in the drops or hood handlebar position,…...

BULLS DESERT FALCON EVO Review

  • MSRP: $6,299
  • MODEL YEAR: 2020, 2021, 2022

A solidly built aluminum alloy road bike with carbon fiber for and seat post to dampen vibration, available in three frame sizes for optimal fit, large network of dealers in the US and Canada for fitting and post-purchase maintenance. 28mph Class 3 speed pedelec performance with the 4th generation Bosch Performance Line Speed motor,…...

BULLS E-CORE EVO AM Di2 27.5+ Review

  • MSRP: $6,899
  • MODEL YEAR: 2019, 2020

A full suspension electric all-mountain bike with a dual battery setup, 150mm travel, large 27.5" plus sized tires, and Boost hub spacing in the rear for strength, made in three frame sizes. Fox Float suspension in the front with great stanchions, Fox Float also here in the…...

BULLS TWENTY9 EVO 1 Review

  • MSRP: $3,899
  • MODEL YEAR: 2019, 2020

A capable and and well-balanced hardtail mountain bike with 29” tires, hydraulic disc brakes, high capacity battery, and a reliable Bosch Performance Line CX Motor. Great Kenda Ace of Pace tires, 29” with 30-50psi, they give you some great float…...

BULLS TWENTY8 E45 Review

  • MSRP: $4,599
  • MODEL YEAR: 2019, 2020

A high-speed, feature-complete, urban electric bike with fenders, front suspension fork, suspension seat post, integrated lights and a nice modern rack. Available in 5 sizes including high-step and mid-step frame styles with a gel saddle and…...

2019 BULLS E-STREAM EVO AM 4 27.5+ Review

  • MSRP: $6,299
  • MODEL YEAR: 2019, 2020

A full suspension all mountain bike with plus size tires, hydraulic disc brakes, high capacity battery, and a lightweight Brose S Mag mid-drive. 27” x 2.8” plus sized tires provide increased traction, great float, and improved comfort while…...

BULLS CLOSSLITE EVO Review

  • MSRP: $4,899
  • MODEL YEAR: 2020

A premium hybrid electric bike available in three frame styles and three sizes, impressive 180mm hydraulic disc brakes with quad piston caliper up front for improved power and cooling, pre-wired for a seat post dropper, integrated LED lights with side view for maximum visibility, reflective puncture resistant tires from Schwalbe. Upgraded Ergon locking grips, gender specific Velo saddle (that felt very comfortable), sleek air suspension…...

BULLS E-STREAM EVO AM 3 27.5+ Review

  • MSRP: $5,799
  • MODEL YEAR: 2019, 2020

A full suspension all mountain bike with plus size tires, hydraulic disc brakes, high capacity battery, and a lightweight Brose S Mag mid-drive. 27” x 2.8” plus sized tires provide increased traction, great float, and improved comfort while…...

BULLS MONSTER E S Review

  • MSRP: $4,899
  • MODEL YEAR: 2019, 2020

A fat tire electric trail bike with a RockShock Bluto suspension fork, remote lockout, 11-speed Shimano Deore XT drivetrain with Shadow Plus clutch, robust skid plate and alloy drivetrain guides. High-torque Bosch Performance Line CX motor with eMTB drive mode, sand and snow capable if…...

BULLS E-CORE EVO EN Di2 27.5+ Review

  • MSRP: $8,499
  • MODEL YEAR: 2019, 2020

A full suspension electric all-mountain or enduro mountain bike with a dual battery setup, 180mm travel, large 27.5" plus sized tires, and Boost hub spacing for strength, made in three frame sizes. RockShox in the front with great stanchions, Fox Float X2 in the rear, Shimano STePs…...

BULLS LACUBA EVO LITE Review

  • MSRP: $4,799
  • MODEL YEAR: 2020

One of the most popular models in the Bulls ebike lineup, it comes in four frame sizes and three styles (high-step diamond, mid-step, and step-thru wave), motor and battery weight are low and center, battery is very high capacity at 37.5v 20ah. Extremely stealthy, the drive system and battery are almost completely hidden on this frame and…...

BULLS SIX50 EVO AM 4 SRAM Review

  • MSRP: $7,899
  • MODEL YEAR: 2019, 2020

A premium all mountain electric bike with 150mm Fox air suspension, SRAM XX1 Eagle 12-speed drivetrain, Bosch Performance Line CX high-torque motor, and Magura MT7 hydraulic disc brakes with adjustable CARBOTeCTURe levers. Wider Boost hub spacing provides a stronger bracing angle for the spokes and additional room…...

BULLS ICONIC EVO TR 1 Review

  • MSRP: $5,099
  • MODEL YEAR: 2019

A comfortable full suspension urban electric bike with adjustable upright body position, wider Boost hub spacing and sturdy thru-axles front and rear, high volume tires offer comfort and stability, they don't have reflective sidewalls but they do offer puncture protection. Totally blacked out aesthetic, everything matches and looks very cool, wires and cables are internally…...

BULLS GRINDER EVO Review

  • MSRP: $4,999
  • MODEL YEAR: 2019, 2020

A high speed gravel grinder electric bike, complete with flared drop bars, puncture resistant studded tires, and a paint-matched spring suspension fork offering preload adjust and lockout. Excellent weight distribution, beautiful Bosch PowerTube battery integration that frees up the main triangle for…...

BULLS AMINGA EVA TR 2 Review

  • MSRP: $4,899
  • MODEL YEAR: 2019, 2020

A women's specific full suspension electric mountain bike with high quality hardware from Shimano, Magura, Fox, Schwalbe and Bosch, available in two frame sizes with sloped top tube for easy mounting and stand over. Highly adjustable air shocks are lightweight, allow you to sag the frame to match your…...

BULLS E-STREAM EVO 45 AM Review

  • MSRP: $5,499
  • MODEL YEAR: 2019

One of the only full suspension mountain bikes from a premium brand that offers Class 3 high speed performance (28mph, 45km/h), long travel 150mm air suspension supports all mountain riding. Excellent weight distribution and drive system integration, the motor and battery are virtually hidden in…...

BULLS STURMVOGEL EVO Street Review

  • MSRP: $3,999
  • MODEL YEAR: 2019

Sporty urban electric bike available in metallic grey or glossy white, premium fenders and front rack add utility, mounting points for a rear rack and bottle cage, quiet Brose Drive T mid-motor. Beautiful stitched ergonomic grips and leather saddle from Velo, unique brown tires with whitewall sides…...

BULLS Cross Lite EVO Review

  • MSRP: $4,399
  • MODEL YEAR: 2019

One of the most popular BULLS electric bikes, available in three frame styles and four frame sizes, fully-integrated Bosch PowerTube battery looks great and improves balance. Powerful Bosch Performance Line CX motor offers high torque for heavy loads and capable climbing,…...

BULLS CROSS E8 Review

  • MSRP: $3,199
  • MODEL YEAR: 2018, 2019

A feature-complete city ebike running the new Bosch Active Plus motor, it's lighter, more efficient, and quieter than previous Active Line iterations, and the compact design is very hidden. Integrated lights and reflective tires keep you safe, the unisex color scheme is professional and…...

BULLS CROSS MOVER SPEED Review

  • MSRP: $3,999
  • MODEL YEAR: 2018, 2019

A sporty speed pedelec with beautiful motor, battery, and able integration, the grey and black color scheme help the drive systems blend in, three frame styles to choose from (wave, step-thru, diamond). Bosch Performance Line Speed motor offers ~28 mph support, shift detection, and 120 RPM pedal…...

BULLS E-STREAM EVO AM 4 Review

  • MSRP: $5,399
  • MODEL YEAR: 2018

A high-end, full suspension, electric mountain bike, with the high-torque Brose S mid-motor, and a high-capacity 37 volt 17.5 amp hour Lithium-ion battery, excellent weight distribution with hidden drive systems. Rugged all-mountain performance with 150 mm RockShox air suspension front and rear, 15 mm and…...

BULLS URBAN EVO Review

  • MSRP: $4,399
  • MODEL YEAR: 2018, 2019

One of the stealthiest 28 mph urban electric bikes I have seen, the Bosch Powertube battery pack is completely hidden inside the downtube and the compact black motor casing blends perfectly with the matte black paint job. The mid-motor is angled up to blend into downtube visually, increase ground clearance, and shorten…...

BULLS SIX50 EVO AM 4 Review

  • MSRP: $7,399
  • MODEL YEAR: 2018, 2019

A top-end all mountain electric bike with 150 mm suspension from Fox, Shimano Deore XTR 11-speed drivetrain, Bosch CX high-torque motor, and Magura MT Trail hydraulic disc brakes. Wider Boost hub spacing offers a strong bracing angle for the spokes and room for…...

BULLS LACUBA EVO E45S Review

  • MSRP: $3,899
  • MODEL YEAR: 2018, 2019

A high-speed 28 mph commuter style electric bike that comes in four frame sizes and three styles (high-step, mid-step, and step-thru), it offers excellent weight distribution (motor and battery are positioned low and center). Beautiful aesthetic with hidden wires, an internally mounted battery, and a smaller motor casing, the…...

BULLS E-CORE Di2 FS 27.5+ Review

  • MSRP: $5,999
  • MODEL YEAR: 2018, 2019

A full suspension electric trail or enduro mountain bike with 150 mm travel, large 2.8" plus sized tires, and Boost hub spacing for strength, made in three frame sizes. All-black frame, fork, and anodized RockShox stanchions makes for a mean look, Shimano STePs E8000…...

BULLS LACUBA EVO E8 Review

  • MSRP: $3,799
  • MODEL YEAR: 2018

One of the most popular models in the Bulls ebike lineup, it comes in four frame sizes and three styles (high-step diamond, mid-step, and step-thru wave), motor and battery weight are low and center. Extremely stealthy, the drive system and battery are almost completely hidden on this frame and…...

BULLS SIX50 EVO AM 3 Review

  • MSRP: $5,499
  • MODEL YEAR: 2018, 2019

An all-mountain style electric bike with longer travel 150 mm air suspension from RockShox, an internalized downtube battery from Bosch, and three frame size options. Fatter 2.8" plus sized tires provide increased traction, reduced deflection, and improved comfort while remaining…...

BULLS CRUISER E Review

  • MSRP: $3,299
  • MODEL YEAR: 2018, 2019

A feature-complete cruiser style electric bicycle with paint-matched fork, fenders, rear rack, chain cover, and motor casing, available in three frame sizes with adjustable stem for good fit. Large sprung saddle, puffy stitched grips, swept back handlebars, and the deep step-thru frame make…...

BULLS AMINGA TR 1 Review

  • MSRP: $4,299
  • MODEL YEAR: 2018, 2019

A full suspension, cross country style, electric mountain bike made just for the ladies with shorter reach, available in two smaller size options, features a turquoise fuchsia colorway. Sturdy Suntour XCR 34 air suspension fork with remote lockout for easy transitions from rough…...

BULLS TWENTY4 E Review

  • MSRP: $2,899
  • MODEL YEAR: 2018, 2019

A tough, sporty looking, high-quality, kids electric bike that can reach ~15.5 mph with four levels of pedal assist, smaller wheels keep the frame low and approachable. Premium accessories including tires from Schwalbe, a Shimano Altus 8-speed drivetrain, and Tektro hydraulic disc…...

BULLS CROSS E Review

  • MSRP: $2,799
  • MODEL YEAR: 2017, 2018, 2019

Well priced considering the quality Bosch-made electric drive system, four frame size choices, and three frame styles (high, mid, and low-step). Integrated LED lights and premium Continental tires with reflective sidewall stripes help to keep you…...

BULLS E-STREAM EVO FS 2 27.5 Plus Review

  • MSRP: $4,099
  • MODEL YEAR: 2017, 2018

One of the cleanest looking full suspension cross country electric bikes I've reviewed, the battery and motor are built into the frame and match the matte black paint perfectly. Extra large battery capacity for longer rides, EnergyBus magnetic charging standard works on or off…...

BULLS SIX50 E 1.5 Review

  • MSRP: $3,099
  • MODEL YEAR: 2017, 2018, 2019

A hardtail trail ready e-bike with comfortable plus sized tires and a spring suspension fork (with lockout), sturdy tapered head tube, rigid thru-axles, and Boost up front. Capable as a commuting platform if you prefer a mountain bike vs. hybrid or city…...

BULLS CROSS LITE E Step-Thru Review

  • MSRP: $4,099
  • MODEL YEAR: 2017, 2018

An active, sporty looking, commuter style electric bike with low standover height, available in three frame sizes to improve fit and comfort. High-end drivetrain and motor systems, you get eleven gears with a tough mountain bike level…...

BULLS SIX50+ E FS 3 Review

  • MSRP: $4,699
  • MODEL YEAR: 2017, 2018

An all-mountain electric bike with plus sized tires for improved stability, traction and comfort, 150 mm air suspension with compression and rebound adjust. Battery and motor mount design are tighter than older Bosch systems, weight is kept low…...

BULLS E-STREAM EVO 45 FS Review

  • MSRP: $5,199
  • MODEL YEAR: 2017, 2018

A high quality full suspension e-mountain bike that's also a speed pedelec (capable of 28 mph top speeds), solid hydraulic disc brakes, wide thru-axles with Boost Technology. Adjustable 150 mm RockShox suspension front and rear, four-bar rear swing arm to reduce brake…...

BULLS E-STREAM EVO 3 Carbon 27.5 Plus Review

  • MSRP: $4,599
  • MODEL YEAR: 2017

A Carbon fiber electric cross country mountain bike with premium components and ultra-integrated motor and battery system, excellent weight distribution. The Brose motor is quiet and responsive offering up to 90 Nm of torque output,…...

BULLS DAIL-E GRINDER Review

  • MSRP: $5,799
  • MODEL YEAR: 2017, 2018

One of the first Gravel Grinder style electric bikes to make it to America! Made with premium components, high performance lights and a purpose built frame in three sizes. Capable of high speed 28 mph performance, the Bosch centerdrive motor measures bike speed, pedal…...

BULLS SIX50 E 2 STREET Review

  • MSRP: $3,899
  • MODEL YEAR: 2017, 2018, 2019

A fully equipped speed commuter capable of 28 mph operation, running on the proven Bosch Performance mid-drive motor and updated 500 watt hour Samsung battery. Extra large 203 mm hydraulic disc brakes offer smooth solid stops without requiring exorbitant hand…...

2017 BULLS LACUBA EVO E8 Review

  • MSRP: $3,999
  • MODEL YEAR: 2017

A versatile urban electric bike well suited to commuting, touring and trekking because of its efficient mid-drive motor and larger than average battery capacity, durable internal gearing and belt drive. Available in five frame sizes and three frame styles including wave, mid-step and high-step diamond…...

BULLS E-STREAM EVO FS 3 27.5 Plus Review

  • MSRP: $4,699
  • MODEL YEAR: 2017, 2018

A stealthy full suspension all-mountain electric bike with longer travel 150 mm suspension, fully adjustable air fork by RockShox, color matched to frame. Larger 37 volt 17.5 amp hour battery pack to assist with steeper climbs and longer…...

2017 BULLS MONSTER E FS Review

  • MSRP: $5,299
  • MODEL YEAR: 2017

Full suspension fat bike with a high quality mid-drive motor from Bosch and their updated 500 watt hour battery pack for extended range. Cool fluorescent paint job that extends all the way through the fork, rear shock housing,…...

BULLS LACUBA EVO E45 Review

  • MSRP: $4,399
  • MODEL YEAR: 2017, 2018, 2019

Available in four frame sizes, two styles (high-step and mid-step) with an adjustable stem, active-comfort saddle and ergonomic grips, this bike can fit well and feel good at speed and over long distances. Capable of 28 mph top speeds, this is a Class 3 electric bike with an…...

BULLS E-STREAM EVO FS 3 27.5 Review

  • MSRP: $4,699
  • MODEL YEAR: 2016

An all-mountain electric bike with beautifully integrated battery, motor and display... it blends in more than most other e-mountain bikes I've tested and runs quiet. Sturdy 15 mm thru axle in the front and 12 mm axle in the rear…...

BULLS SIX50 E FS 3 RSI Review

  • MSRP: $4,599
  • MODEL YEAR: 2016

A loaded full suspension mountain bike with premium electric drivetrain from Bosch offering 75 Nm of climbing torque with the CX motor and a 400 watt hour Samsung battery. RockShox air suspension with 120 mm travel front and rear for solid trail or all…...

2017 BULLS MONSTER E S Review

  • MSRP: $4,299
  • MODEL YEAR: 2016, 2017

Premium hardtail electric fat bike with all the fixins, highlights include rear rack bosses, tubeless-ready tires and punched out rims, RockShox air fork with remote lockout and high torque Bosch CX motor. Quality 180 mm hydraulic disc brakes from Shimano for excellent stopping power and modulation, impressive…...

BULLS OUTLAW E45 Review

  • MSRP: $3,999
  • MODEL YEAR: 2016

A sporty looking, fairly comfortable speed pedelec capable of ~28 mph top speeds, it's running on an optimized geared hub motor design with heat pipe technology for maximum performance. Unique mid-mount battery box fills the main frame triangle keeping weight low and centered while…...

BULLS STURMVOGEL E EVO Review

  • MSRP: $3,699
  • MODEL YEAR: 2016

A beautifully designed urban electric bike painted white for visibility and modern appeal, white walled tires, reflective sidewall stripes, LED lights. Extra sturdy and durable thanks to a 15 mm thru-axle on the front wheel (with…...

BULLS TWENTY9 E FS 3 RSI Review

  • MSRP: $4,599
  • MODEL YEAR: 2016

A full suspension, Bosch powered, cross country style electric bike with efficient 29" wheels, it's available in three sizes for good fit and would feel taller and larger for riders with long legs but still fits some shorter riders given the angled top tube. Quick release for both wheels ads convenience for fixes and transporting the bike, I love…...

BULLS CROSS LITE E Review

  • MSRP: $3,699
  • MODEL YEAR: 2016

Fully loaded urban electric bicycle with great accessories for commuting including an aluminum rear rack, full length fenders with mud flaps and integrated LED lights. Relatively light weight at under 50 lbs, this is due in part to the nicer…...

BULLS E-STREAM EVO FS Enduro 27.5 Review

  • MSRP: $5,399
  • MODEL YEAR: 2016

An enduro style full suspension electric mountain bike with longer 160 mm suspension travel, seat post dropper, 27.5" wheelset and premium hydraulic brakes. Downtube-integrated battery pack is out of sight and keeps weight low and centered across the…...


Comments (10) YouTube Comments

jv
5 years ago

After spending over 6k for the Bulls Monster E FS, I must say I regret the purchase. Although the bike is not without it’s fun factor, and uniqueness among fat bikes, the Monster E FS is not without it’s flaws, examples such as poor brakes both front and rear, cheap pedals, generic manuals with a lack of specific model information, horrible local dealer pre-delivery setup, but most importantly, abysmal customer service and warranty support (5 outstanding warranty issues) from BULLS USA, just to mention a few. Your better off spending your hard earned dollars on a better brand. Make sure you have both dealer and brand support number one! I wish I had.

  Reply
Court
5 years ago

Awww, that’s such a bummer to hear JV! One of the benefits of going with a dealer brand like BULLS, in my opinion, is that they should offer better setup, fitting, and post-purchase support. What dealer have you been working with that didn’t work out? Perhaps the parent company will see your feedback and become more selective about the dealers they choose. I know of other dealers that really strive for quality and perhaps your experience would have been better with them. It’s just sad to hear because I know that you spent more to get this bike vs. another fat bike that might have been shipped direct.

  Reply
jvarga
5 years ago

Court, after several attempts to rectify deficiencies, as well as warranty issues with the Dealer, Kelowna Ebike, on my “NEW” Bulls Monster E FS, the Dealer abruptly stopped responding to attempts at communication to resolve all the outstanding issues, claiming the bike was “NEW” therefore no deficiencies could exist, and there was nothing he could do, not to mention warranty issues that subsequently appeared. The dealer gladly took my 6k, but that is where the service stopped, completely. Attempts to deal with Bulls USA directly through the website yielded not much better results, as the current representative of Bulls, (there had been 3 website reps) I was corresponding with, at times with an ongoing conversation on a issue would take over two weeks to reply, which at one point had me contact Bulls USA to inquire as to whether the representative still worked at Bulls USA, to which I once again, never received a reply. This is all unacceptable, leaving me with a e-bike claimed as “NEW” by the dealer, minus the deficiencies, and warranty issues, with no recourse but to resolve all the deficiencies and warranty issues at my expense, labor and time, and 6k lighter in my pocket book. My expectations were surely inflated thinking high end bikes sales, service and quality greatly exceeded those low end box store brand bikes.

CAB
5 years ago

I can confirm JV’s issues. My bike has been in the shop more than out it feels. Terrible Brakes, horrifically loud regardless of adjustments, creaking bottom bracket to CX mount and most recently stranded with a broken cassette ratchet. My local shop is great trying to service it, but they get no support from Bulls. I wish I could have found someone like me to talk to before buying this lemon. I assumed it was just mine.

  Reply
Court
5 years ago

Oh man, that sucks CAB! I’m so sorry to hear this and it breaks my heart because I know this is an expensive bike… The parts seemed good and my test rides were fun but perhaps the rigorous environments and seeming lack of support you’ve received aren’t living up to the review here. Thanks for sharing your comment, I appreciate it.

  Reply
DP
5 years ago

WOW, these comments are a eye opener. I Have a MONSTER FS on order that will be shipped to me. I live in Arizona and realize that I will not have any support for my bike. Also disturbing is the length of time that passes before posts on the Bulls website are answered. I like this product but I could purchase two Imported clunky fat tire bikes for the price of the Monster FS. IZIP and Raleigh fat tires are hard to find.

Any feedback would help my decision on purchasing this bike.
DP

  Reply
Court
5 years ago

Hi DP! I was surprised by the complaints of failure because normally Bosch motors are so reliable. I personally have owned a couple of Bosch ebikes that worked great, but I never had one on a fat bike like the Monster. It’s always nice to have a shop nearby to help build, fit, and service your ebike, especially if you ride in rough terrain or sand/mud. Maybe others will chime in but all I can do is wish you good luck and invite your future feedback on the product :)

  Reply
jvarga
4 years ago

FURTHER UPDATE, Recently the Bosch drive motor has exposed some issues after approximately 500k. Engagement sometimes takes two or three crank revolutions, so the crank is just free wheeling. Sometimes engagement is very slow, and when the drive motor does engage, there is a distinct noise that can be heard quite easily. As well, it seems that sometimes the assist is not at maximum level, and only at higher cadence does the assist feel at full load. This was not the case when new, as in all assist levels when starting out, you needed to be alert as the bike would jerk your body back from the sudden power, the type of power I would expect for 6k.

All said and done, I would caution future buyers of BULLS products to be aware. In the case of the MONSTER E FS, a poor quality fat bike using some lower level components, plenty of warranty issues, ZERO dealer service in my case, and horrible service from BULLS make for an expensive 6k paper weight.

  Reply
Court
4 years ago

Oh man, that’s a real bummer. I thought that this was a really neat ebike because it was one of the only mid-drive fat models that also had full suspension. To me, the components all seem above-average… lightweight air suspension, good brakes, and nicer Shimano Deore XT drivetrain. I’m sorry to hear that the Bosch motor has degraded a bit or just struggled to meet your expectation. I hope your next ebike works out better :/

  Reply

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