BULLS Monster E FS Review

Bulls Monster E Fs Electric Bike Review
Bulls Monster E Fs
Bulls Monster E Fs Bosch Performance Line Cx Chain Tensioner
Bulls Monster E Fs Bosch Powerpack 500 Battery
Bulls Monster E Fs Removable Bosch Intuvia Display Panel
Bulls Monster E Fs Rockshox Monarch Rt Rear Suspension
Bulls Monster E Fs Rock Shox Bluto Rl Solo Air
Bulls Monster E Fs Magura Mt Hydraulic Disc Brakes
Bulls Monster E Fs Shimano Deore Xt 11 Speed Drivetrain
Bulls Monster E Fs Electric Bike Review
Bulls Monster E Fs
Bulls Monster E Fs Bosch Performance Line Cx Chain Tensioner
Bulls Monster E Fs Bosch Powerpack 500 Battery
Bulls Monster E Fs Removable Bosch Intuvia Display Panel
Bulls Monster E Fs Rockshox Monarch Rt Rear Suspension
Bulls Monster E Fs Rock Shox Bluto Rl Solo Air
Bulls Monster E Fs Magura Mt Hydraulic Disc Brakes
Bulls Monster E Fs Shimano Deore Xt 11 Speed Drivetrain

Summary

  • 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, swing arm and battery pack, I think the battery blends in nicely and appreciate the metal base cup
  • Premium hardware here including tubeless-ready Schwalbe Jumbo Jim tires that can be ridden at lower pressure, light weight punched out rims and RockShox air fork
  • Eleven speed Shimano Deore XT drivetrain with chain tensioner, shift sensing software in the motor controller, Magura hydraulic disc brakes and thru-axles for improved stiffness

Search EBR

Video Review

Trusted Advertisers

Introduction

Make:

BULLS

Model:

Monster E FS

Price:

$5,299

Body Position:

Forward

Suggested Use:

Trail, 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:

Europe, Canada, United States, Australia, New Zealand

Model Year:

2017

Bicycle Details

Total Weight:

55.6 lbs (25.21 kg)

Battery Weight:

5.7 lbs (2.58 kg)

Motor Weight:

8.8 lbs (3.99 kg)

Frame Types:

High-Step

Frame Sizes:

18.11 in (45.99 cm)20.07 in (50.97 cm)

Geometry Measurements:

31" Stand Over Height, 76" Length

Frame Material:

7005 Aluminium

Frame Colors:

Neon Yellow with Matte Black Accents

Frame Fork Details:

Rock Shox Bluto RL Solo Air, 100 mm Remote Lockout, 15 mm E-Thru Axle

Frame Rear Details:

RockShox Monarch RT High Volume with 120 mm Travel, Rebound Adjust, 12 mm Quick Release Thru-Axle

Gearing Details:

11 Speed 1x11 Shimano Deore XT, 11-40

Shifter Details:

Shimano XT Triggers on Right

Cranks:

FSA CK-760/IS Cranks, 15T Chainring

Pedals:

Wellgo Alloy Platform, Cage STyle

Headset:

Tapered 1 1/8"

Stem:

7° Rise (80 mm, 90 mm)

Handlebar:

Low Rise, 720 mm, 25 mm Rise, 9° Bend

Brake Details:

Magura Hydraulic Disc with 180 mm Rotors, MT-5 Four Piston Front MT-4 Two Piston Back Calipers, Magura MT Levers

Grips:

Ergon GA30 Locking Grips, Flat, Black

Saddle:

Selle Royale Seta M1

Seat Post:

Alloy

Seat Post Length:

350 mm

Seat Post Diameter:

30.9 mm

Rims:

Alloy, Punched Out Square Holes, 32 Hole, 80 mm Width

Spokes:

Stainless Steel, 13 Gauge, Black

Tire Brand:

Schwalbe Jumbo Jime, 26" x 4"

Wheel Sizes:

26 in (66.04cm)

Tire Details:

Pace Star 3, Tubeless Easy Snakeskin

Tube Details:

Presta Valve

Accessories:

Sticker Slap Guard, Chain Tensioner with Narrow Wide Teeth

Other:

Aluminum Skid Plate, Locking Removable Battery Pack

Electronic Details

Motor Brand:

Bosch Performance Line CX, Gen 2

Motor Type:

Mid-Mounted Geared Motor
Learn more about Ebike motors

Motor Nominal Output:

350 watts

Motor Torque:

75 Newton meters

Battery Brand:

Samsung

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:

45 miles (72 km)

Estimated Max Range:

130 miles (209 km)

Display Type:

Intuvia, Removable, Adjustable Angle, Grayscale, Backlit LCD

Readouts:

Speed, Assist Level (Eco, Tour, Sport, Turbo), Battery Level (1-5), Odometer, Trip Distance, Estimated Range, Clock, Max Speed, Average Speed, Trip Time, Shift Assist Recommendation

Display Accessories:

Independent Button Pad with Tactile Feedback on Left, 6 Volt Micro USB Port on Display

Drive Mode:

Advanced Pedal Assist (Measures Wheel Speed, Pedal Cadence and Pedal Torque, Power Output Relative to Pedal Input: Eco 50%, Tour 120%, Sport 210%, Turbo 300%)

Top Speed:

20 mph (32 kph)

Trusted Advertisers



Written Review

Fat tire electric bikes offer a perfect blend of technology and adventure in my opinion… an unpowered fat bike is fun, sure, but the added weight and drag of larger wheels and tires means that most people are limited in how far and long they can actually enjoy the ride. Furthermore, if you actually do seek out the snowy fields and sandy beaches that those fat tires yearn for (as I did in this video review), they can become uncomfortable because the terrain isn’t always smooth! And once you’ve added suspension there’s increased weight and often some bob as you pedal along. So that’s where this whole full suspension fat tire electric bicycle concept fits in… In many ways, it isn’t that surprising right? We see full suspension motocross bikes all the time, in fact I think most motorcycles (even road bikes) offer full suspension. But they’re loud, heavy and usually illegal on bike paths, mountain trails and beaches. The Monster E FS delivers something special in this domain, an ebike that’s both capable of handling a wide variety of terrain and usually well accepted there. It’s made with some of the best consumer/performance level hardware on the market as of this review (Magura brakes, Shimano Deore XT derailleur) and is driven by one of my favorite motor systems around, the Performance Line CX from Bosch.

With internally routed cabling, a sporty paint job and some additional metal shields in place, the battery pack truly blends in on this bike. And despite offering about 25% larger battery capacity than the previous Powerpack 400, the battery form factor is exactly the same and it weighs less than a half a pound more! You can still charge it on or off the bike and it’s even backwards compatible so if you already own a Bosch powered electric bike from the 2014-2016 timeframe you can swap them out or carry an extra along for increased range. Having tested and reviewed some of the other BULLS electric bike models recently, those with the more tightly integrated Brose battery/motor system, I gained renewed appreciation for how beautifully and simply the Bosch pack clicks in and locks. You don’t have to worry so much about bumping the key if you accidentally leave it in and you don’t have to physically twist the key to lock the pack… just when you unlock it, and this increases security. Going from there, the control panel and button pad that let you interact with the battery and motor are both very well done. You can switch assist levels on the fly without lifting your left hand and compromising your grip… just a bit of thumb work. And you can also cycle through display readouts this way. One of my favorite menus is range approximation because it dynamically updates depending on how you’re riding, what assist level you’ve selected and how much battery capacity remains in the pack. This is the sort of feedback that ensures you won’t get stuck way out in the backcountry with a depleted pack. This is especially relevant because the battery indicator only shows five bars vs. 10 on some other bike displays. That’s one of my minor gripes.

If you do get stranded on this ebike, no worries because it has a wide range of 11 gears for pedaling. And in the electric bicycle world, that’s quite a few! I found that the bike was operable on human power alone (especially on pavement) and enjoyed the rolling momentum that the tires offered once up to speed. It was easy to handle the bike on all terrain types we tested thanks to longer mountain bike style bars with locking Ergon grips and I appreciated the remote lockout on the Bluto suspension fork. Many of the hardware components chosen for this bike are of a higher build quality and designed to be light weight. At just under 56 lbs… this is what I would consider very light given how large it looks and the fact that it’s a fat bike with full suspension. It is missing a few things though, no kickstand means it could tip into your fancy car in the garage more easily and no bottle cages mean you’ll need a hydration pack. Part of me yearned for throttle on demand operation in addition to pedal assist but I recognize that this would change the class of the bike, exhaust the battery much faster and ad clutter to the cockpit. It might also delay how quickly the motor cut out resulting in sketchy performance on difficult technical terrain. Yes, this is a hard core capable bike that would handle serious riding. Bosch offers one of the most responsive, zippy feeling drive systems around and if you’re in the highest level of assist (there are four to choose from) it works very well, almost responding like a throttle without requiring exhaustive pedaling force. Almost as soon as you’ve stopped pedaling, the motor also stops and that’s a great feeling… but it works the other way too, responding especially fast as your cadence increases (ie. shifting to lower gears for climbing or maneuvering through an obstacle course of rocks, ice or fauna).

I honestly don’t have many complaints to share about this ebiket. Its great that given just how custom and unique a build it is, BULLS was able and willing to manufacture two sizes. Their two year comprehensive warranty is excellent and despite the perceived higher price point, I actually think you’re getting a good deal relative to what other companies charge for similarly specced builds using less interesting drive systems. Consider their hardtail Monster E model if you’re looking to save $1,000 and don’t mind a stiffer rear… In that case you could always add a seatpost suspension as a compromise. As someone with limited storage space, I tend to choose one high quality bike to “do it all” and that’s exactly what this offers. You get comfort, longer lasting parts and a bike that won’t quite. In a world with more and more 3″ tires it’s great to see an actual full sized 4″ wide fat tire bike that’s done so well. Powerful hydraulic disc brakes, thru axles, a tapered head tube and a custom replaceable metal skid plate make this bike extra tuff. Not to mention the chain tensioner with fully surrounding guide and narrow wide teeth. I love that you can easily and quickly take both wheels off for compact storage and transport and am glad that BULLS opted for the four bar rear suspension design to optimize traction, reduce bob and lower as much weight as possible. It’s a great bike, lots of fun and easy to use. Compared with some other full suspension fat ebikes I’ve tested, it offered a wider range of pedaling speeds while still supporting me with motor power. The motor is just more capable at high RPM and that’s how I prefer to pedal, it happens naturally as I shift down approaching hills, I don’t feel like the motor quits on me. As someone with sensitive knees, this has been one of my favorite fat bikes so far and I’m optimistic about how it could be used on so many terrain types and in so many seasons. Big thanks to Bulls for partnering with me for this review.

Pros:

  • Custom paint and decal job that includes the frame, rear swing arm and pivot point, suspension fork and rear suspension housing! EVERYTHING matches and looks awesome
  • Sturdy 15 mm thru axle on the front with 12 mm at the rear, keeps the larger heavier wheels tight and responsive, both offer quick release which is handy for repairs or simply transporting the bike since it’s so large
  • In addition to removable wheels, the battery pack and display console are also removable… I love that the battery can be charged on or off the frame and is backwards compatible with the older Bosch Powerpack 400 batteries
  • Top-end components from Magura, Rock Shox, Schwalbe, Ergon and Shimano that will hold up in off-road conditions and are backed by the BULLS comprehensive two year warranty
  • I was impressed that even with the larger capacity battery, full suspension setup and fat tires this bike weighs just ~55 lbs and I love that it comes in two sizes for improved rider fit
  • Most of the weight is positioned low and center across the frame, this improves handling and since it’s a mid-drive, reduces unsprung weight compared to a hub motor
  • You get 11 gears so pedaling feels comfortable at a wide range of speeds… even if the bike is turned off and the Bosch motor offers shift sensing to reduce wear
  • I love that they included a chain tensioner with a full hood to act as a guide (clearing debris and mud), it should reduce kickback from the rear swing arm and the narrow wide tooth pattern is designed to reduce chain slip
  • Punched out rims reduce weight, look cool and might add some cushion to the tires for improved comfort and traction at lower PSI
  • Sturdy metal motor cover… like a louvered push guard on a truck, designed to protect the sensitive bits but be replaceable if you encounter major damage
  • This is the only Bosch powered full suspension fat bike I’ve seen to date and is definitely my preference in terms of power, zip and responsiveness compared to Yamaha and other mid-drive systems, the chainring spins fast and is super quick to start and stop which is great for unstable terrain
  • The Bosch Intuvia display panel is large and easy to read, simple to use and doesn’t require that you reach far while holding the grips to operate, a remote button pad with tactile feedback is mounted very close to the left grip… I also like that the display panels has a Micro USB charging port built into the side for maintaining your portable electronics

Cons:

  • The bike worked fine in the sand but requires pedaling (Class 1 pedal assist) and there are times when it’s nice to have throttle power just to power through soft terrain or get started again after stopping… the benefit of Class 1 is that it’s allowed on more trails vs. Class 2 throttle powered ebikes
  • The rear suspension joints and shock take up the space where a bottle cage or other accessory mount might have been fit… you can’t add a rear rack easily (unless you compromise with a beam rack) so you might end up using a hydration pack all the time
  • The Bosch battery doesn’t blend in with the frame quite as nicely as the Brose battery on some other BULLS ebike models but it is easier to remove and comes in a higher ~500 watt hour capacity here for longer range rides, I like that the built some metal plates around the base to help it blend in… and added those matching yellow stripe stickers
  • This is an expensive electric bike… you’re getting a lot of high quality hardware but if you ride it near saltwater without rinsing it afterwards or if you’re on other corrosive terrain frequently (salted snow?!) then it will wear out more quickly, there’s a trade-off with bikes like this where you can get one that’s pretty good for half the price and then completely replace it in a year or two vs. one very nice one that you need to care more about to extend

Resources:

Trusted Advertisers

More BULLS Reviews

BULLS E-Stream EVO 45 FS Review

  • MSRP: $5,199
  • MODEL YEAR: 2017

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

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 E2 Street Review

  • MSRP: $3,899
  • MODEL YEAR: 2017

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…...

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

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…...

BULLS Lacuba EVO E45 Review

  • MSRP: $4,399
  • MODEL YEAR: 2017

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…...

BULLS Monster E S Review

  • MSRP: $4,299
  • MODEL YEAR: 2016

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…...


Be the First to Post a Comment

Your email address will not be published.

Start a new monster e fs thread on the BULLS Forum page

glcwhistler
5 days ago

I wouldn't want to bring a $500 bike on the beach. No way in hell would I ride a $5000 bike in a salty environment. "That looks fun.. " Yeah, as long as it isn't your own bike.

mvh808
2 weeks ago

Just a little detail: All USB ports deliver 5V - what you want to say is how much current (Amps) you get from the USB port. Normally (Laptop) would be 500mAh vs a good phone charger that can deliver up to 3Ah.

J Clar
3 weeks ago

impressive. Although I wish I was as light as him

Ali Y
3 weeks ago

how much this can run how fast

DoubleTake Entertainment Media
4 weeks ago

Save a research click... $5,199.00 | No Sales Tax - FREE Shipping |........ horrible price ratio compared to other models with more power. high end bosch components are not worth the extra cost on this one when compared to models costing $2500 less.

rbc21
1 month ago

its officially my dream bike but it cost half of my cars worth. mean time i'll stick with my non electric cheap hardtail bike.

byteresistor
1 month ago

What the hell is it in e-bikes that make them cost so much?

Andre N
2 weeks ago

byteresistor Aluminum & greed

madogblue
1 month ago

I am curious how you would compare thus bike and it's drive to the specialized Turbo levos

juan jose Lopez
1 month ago

excellent bikes but i dont understand why they have to be so expensive because the motorcycles can be cheaper and the materials are similar, i would like to buy one but its too far from my budget, let me know when they be affordable

HTFAT
1 month ago

just bought the Turbo Levo Fat HT to go with my Fattie6,winter/summer 2 batteries

Grace Dawson
2 months ago

Very disappointing that ebikes are limited to 25km/h in Australia :(

Tom Thumb
3 months ago

Nice Ebike. I want two.

Larry Conger
3 months ago

WOW this bike is amazing. This is the best looking Fat bike I have seen plus the Bosch engine! Full Suspension knock out...

TheGreekBiscuit
3 months ago

Let's just pretend if i don't want to pedal for a day will the mid drive still work by me accelerating?

PlastaSin
3 months ago

Dude! You're all riding past parked cars with neither a door's width clearance nor even acknowledging any hazard. Be safe out there people.

ThingsDemystified
4 months ago

Nice video. I'm glad you stopped at the stop sign. Need to educate others to follow the law.

EdWatts
4 months ago

I remember times when an American could purchase a Cadillac, a Corvette, or a Ferrari for $5299. Yeah, I'm old, but does anyone need any further evidence of how far America has fallen? Bicycles? Please...

Tyrone brown
4 months ago

how much does it cost

NOMagz.com
4 months ago

Gòod bikes. And i like your town.

WANSKA
4 months ago

I wish someone made a proper touring fatty with Rohloff hub and Gates Carbon belt. Sand and dirt in the gears and chain is just a bitch to clean all the time not to mention when using these bikes in the winter time for heavy commute use