BULLS SIX50+ E FS 3 Review

Bulls Six50 Plus E Fs 3 Electric Bike Review
Bulls Six50 Plus E Fs 3
Bulls Six50 Plus E Fs 3 Bosch Performance Line Cx Motor
Bulls Six50 Plus E Fs 3 Bosch Powerpack 500 Battery
Bulls Six50 Plus E Fs 3 Bosch Intuvia Display Ergo Grips
Bulls Six50 Plus E Fs 3 Schwalbe Rocket Ron Tires 650b Plus
Bulls Six50 Plus E Fs 3 Rockshox Yari Rc Air Suspension
Bulls Six50 Plus E Fs 3 Shimano Deore Shadow Xt Plus 11 Speed
Bulls Six50 Plus E Fs 3 Rock Shox Deluxe Rt Rear Suspension
Bulls Six50 Plus E Fs 3 Bosch Battery Charger
Bulls Six50 Plus E Fs 3 Electric Bike Review
Bulls Six50 Plus E Fs 3
Bulls Six50 Plus E Fs 3 Bosch Performance Line Cx Motor
Bulls Six50 Plus E Fs 3 Bosch Powerpack 500 Battery
Bulls Six50 Plus E Fs 3 Bosch Intuvia Display Ergo Grips
Bulls Six50 Plus E Fs 3 Schwalbe Rocket Ron Tires 650b Plus
Bulls Six50 Plus E Fs 3 Rockshox Yari Rc Air Suspension
Bulls Six50 Plus E Fs 3 Shimano Deore Shadow Xt Plus 11 Speed
Bulls Six50 Plus E Fs 3 Rock Shox Deluxe Rt Rear Suspension
Bulls Six50 Plus E Fs 3 Bosch Battery Charger

Summary

  • 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 and center for balance, available in three frame sizes for improved fit
  • 1 x 11 drivetrain is light and clean, narrow-wide tooth pattern on the chainring compliments the Shadow+ derailleur tightening clutch to reduce bounce and drops
  • High capacity Powerpack 500 improves range, Bosch CX motor offers high torque for climbing, no bottle cage bosses, no seat post dropper, stickers vs. paint

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Video Review

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Introduction

Make:

BULLS

Model:

SIX50+ E FS 3

Price:

$4,699

Body Position:

Forward

Suggested Use:

Trail, Mountain

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:

20172018

Bicycle Details

Total Weight:

52.5 lbs (23.81 kg)

Battery Weight:

5.8 lbs (2.63 kg)

Motor Weight:

8.8 lbs (3.99 kg)

Frame Material:

7005 Aluminium Alloy

Frame Sizes:

16.1 in (40.89 cm)17.3 in (43.94 cm)19.3 in (49.02 cm)

Geometry Measurements:

30" Stand Over Height

Frame Types:

High-Step

Frame Colors:

Matte Black with Gloss Orange and Blue Accents

Frame Fork Details:

Rock Shox Yari RC 29/27.5+ Suspension, 150 mm Travel, Compression Adjust, Rebound Adjust, Boost 110 mm / 15 mm Thru Axle with Quick Release

Frame Rear Details:

Rock Shox Deluxe RT Suspension, 150 mm Travel, Rebound Adjust, Compression Adjust, Boost 148 mm / 12 mm Thru Axle with Quick Release

Gearing Details:

11 Speed 1x11 Shimano Deore XT Shadow Plus, 11-42

Shifter Details:

Shimano Deore XT DYNA-SYS11 Triggers on Right

Cranks:

SR Suntour Cranks, 175 mm Length, 15T Chainring with Alloy Bash Guard, Narrow Wide Teeth

Pedals:

Wellgo C128DU Alloy Platform, Cage Style

Headset:

Tapered 1-1/8" to 1-1/2"

Stem:

STYX Alloy, 7° Rise, 31.8 mm Bore, Lengths: (60 mm, 70 mm)

Handlebar:

STYX Alloy Low Rise, 740 mm Width, 25 mm Rise, 9° Bend, 31.8 mm Bore

Brake Details:

Magura MT5 Storm Hydraulic Disc with 180 mm Rotors, 4 Piston Front Caliper 2 Piston Rear Caliper, Magura MT5 Levers with Adjustable Reach

Grips:

Velo Rubber Ergonomic, Locking

Saddle:

Selle Royale, Active

Seat Post:

STYX Aluminum Alloy

Seat Post Length:

350 mm

Seat Post Diameter:

30.9 mm

Rims:

Bulls, Alloy, Double Wall, 35 mm Width, 32 Hole

Spokes:

Stainless Steel, 14 Gauge Front, 13 Gauge Rear, Black with Nipples

Tire Brand:

Schwalbe Rocket Ron, 27.5" x 2.8"

Wheel Sizes:

27.5 in (69.85cm)

Tire Details:

Performance, Folding, 17 to 38 PSI

Tube Details:

Presta Valve

Other:

Locking Removable Battery Pack with LED Charge Indicator, 1.7 lb 4 Amp Charger

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 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 hours

Estimated Min Range:

30 miles (48 km)

Estimated Max Range:

70 miles (113 km)

Display Type:

Bosch 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, 5 Volt 500 mA 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 190%, Turbo 275%)

Top Speed:

20 mph (32 kph)

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Written Review

The Bulls SIX50+ E FS 3 is a fun all-mountain ebike with Bosch CX drive system. It’s fun, because it can go almost anywhere with longer travel 150 mm suspension from RockShox and plus sized 2.8″ tires from Schwalbe. As a Class 1 electric bike with 20 mph top assisted speed, it would be allowed on more trails than Class 2 or 3 and I was able to pedal faster than this off-road due to in part to the larger wheel diameter. It coasts fast and rolls over obstacles with ease. Weighing in at about 52 lbs and offering three frame size choices, it’s a bike that can fit more riders and handles very well, it feels balanced. Most of the drive system weight is low and center where you want it, there’s limited unsprung weight. The wheels feel sturdy and stiff, even with larger tires, thanks to Boost hubs (slightly longer than average) and the 15 mm and 12 mm thru-axles. You get quick release on both wheels and the battery pack and display can also be taken off to reduce weight or store / charge separately. The motor is extremely responsive and powerful but does produce a whining noise at higher speeds, Bosch is known for offering higher than average max assisted cadence up to 120 RPM which means you can spin with lower gears and still get help from the motor… Some Yamaha systems by comparison, only assist up to 100 RPM. A highlight with the design of this bike is how the motor and battery are built into the downtube. The motor is angled up and blended into the frame with alloy plates extending to the base of the battery. Bosch drive systems aren’t as hidden or stealthy as Brose (which is available on some other Bulls models) but this one looks pretty good and the battery is going to be easier to remove, the battery interface is backward compatible with Bosch Powerpack 400. I also noticed that the battery could be locked and charged more easily than the Brose system and had a nicer rubber cover but there wasn’t room for a bottle cage mount in the central triangle of the frame.

Driving the bike is a 250 watt nominally rated Bosch mid-drive CX model that produces 75 Newton meters of peak torque output. It’s very impressive, don’t let the lower watt rating fool you… it peaks out above 500 watts and has been a top performer for me in climb tests, outperforming higher rated motors due to its responsiveness. Rather than spinning a standard sized chainring, Bosch systems use smaller rings (like the 15 Tooth ring here) that rotate at 2.5 times your pedal cadence. One limitation is that it does not currently support multiple chainrings and the smaller ring doesn’t get as much clearance over the right chainstay. This means the chain runs closer to the stay and can bounce into it on bumpy terrain. To address this, the SIX50+ E FS3 has a thin rubberized slap guard and is built with Shimano Deore XT Shadow+ drivetrain components. The Shadow+ model derailleur has a clutch system that can tighten the chain to reduce bouncing, slip and drops. And the chainring uses a narrow-wide tooth pattern and has an alloy bash guard (outer guide) to keep everything on track. Everything worked well during my ride tests across pavement, gravel and wood chips. Note that shifting requires a bit more effort when the Shadow Plus clutch has been engaged. The Bosch motor offers limited shift sensing that reduces mashing but you’ll still want to shift thoughtfully while easing off your pedaling a bit. The motor controller measures rear wheel speed, pedal cadence and pedal torque one thousand times per second to optimize response and shifting performance and as you ease off, the torque signal reduces motor power.

Powering this electric mountain bike is the new Bosch Powerpack 500 which fits the same dimensions and design as the older 400 watt hour pack and only weighs ~0.3 lbs more while delivering 25% more capacity for increased range. It’s an impressive battery that’s easy to mount, dismount, carry around and charge with the compact charger mentioned earlier. The left side of the case has a button with five LED ticks to indicate charge level which is useful if you’ve stored the bike in a garage or somewhere away from the pack and want to double check if it needs to be refilled before a ride. To maximize the life of this and other Lithium-ion batteries, you can store it in a cool, dry location. Bosch ships this battery at about 50% to avoid stressing the cells and that could be interpreted as a good way for you to store it for longer term periods between use… but avoid letting it get to and stay at 0%, I usually charge it up after a month or two of disuse and get it to 80% vs. 100% to avoid stressing the cells.

Operating the Bulls SIX50+ is very easy and quick. Once the battery is charged and mounted, you can hop on and ride around like a normal bike… then press the power button on the Bosch Intuvia display panel to boot it up and get assist. There are four power levels and I tend to ride in the second one (Tour) for a good mix of efficiency and support. The first level (Eco) is enough to reduce the struggle of pedaling a 52 lb bike around, making it feel like a normal 25 lb bike but it won’t do much for climbing or accelerating. Changing support levels can be done without removing either hand from the grips if the system has already been turned on. There’s a button pad near the left grip with up and down arrows that click as you press them. In between these buttons, an Information button is rounded and rubberized, creating a physical reference point. This button cycles through trip stats like max speed and trip distance but also shows range. Range is cool because it’s dynamically calculated using the last three miles of ride data, your battery level and the chosen assist level. For me, it’s much more useful than the five bar battery readout on the battery and display panel. The display is faintly backlit to make it readable at night but not so bright that it becomes distracting. It swivels to reduce glare and has a light bulb button near the lower right corner which isn’t used on this electric bicycle because lights have not been added. Depending on your local shop, integrated lights can be placed and they will run off the battery vs. independent cells. Note that you can enter into the display to change the clock, adjust shift recommendation and switch from miles per hour to kilometers per hour by holding the reset and i buttons on the display panel.

The Bulls SIX50+ E FS 3 is a go-anywhere machine that’s nimble and beautiful. I love the battery and motor integration and appreciate the upgraded Selle Royale saddle, Magura hydraulic brakes and ergonomic locking grips. While I do wish it came with a seat post dropper, the quick release seat tube collar does the trick with a little more time. Bulls has a great reputation in Europe and has entered the US without missing a beat. Their bikes aim to balance value with high quality hardware, dealer support and a solid warranty. The terrain I tested this model on does not do it justice but I still had a blast. It’s easy to reach and maintain 20 mph on rolling terrain and even moderate inclines but going faster is no problem on flats and downhill thanks to the larger tires which almost ride like 29ers. Big thanks to Bulls for partnering with me on this post and taking me out to a few neat spots near their US headquarters in Los Angeles.

Pros:

  • Tight motor integration, older Bosch Centerdrive motors bulged out in the front and hung down lower, this one is angled and tucked up into the downtube raising clearance and blending in nicely
  • The battery pack looks great as well, the base is cupped by an Aluminum flange that extends towards the motor and stickers connect the two sections visually
  • Longer Boost hubs support plus sized 2.8″ tires which provide stability and improved traction, they’re a blast for trail riding and push the effective diameter of the 27.5″ rating closer to 29″ which improves speed and allows you to roll over large obstacles
  • Three frame sizes available so you can dial in fit, angled top tube lowers stand over height so mounting and dismounting is safer
  • Stiff thru-axles offer strength and support the wider, heavier tires, you also get quick release on both so trail maintenance and transport is faster and easier
  • Both the display and battery pack are removable which takes the bike weight down to ~47 lbs for easier transport on car racks (especially useful if you’re moving several bikes at once)
  • Micro USB port on the right edge of the Bosch Intuvia display panel can run some electronic devices or help charge a bright headlight for dusk or trail rides
  • Air suspension is more adjustable and lighter weight than coil, both are long-travel with compression and rebound adjust as you’d expect from higher end components
  • Compared with the Brose powered Bulls models I feel like the battery pack is easier to charge and the charging port is better protected, taking the pack off also feels safer because it’s lighter weight and has a handle loop at the top
  • The increased torque of the Bosch CX motor combined with trail riding means the chain, sprockets and derailleur may take more abuse even though the motor has software driven shift-sensing, to help keep the chain on track and reduce bouncing and slipping you can activate the one-way clutch on the Shimano Deore XT Shadow Plus (the grey lever that pulls back)
  • The chainring features Narrow-Wide teeth to lock onto the chain better and reduce slipping and kickback (since this has rear suspension), it pairs nicely with the Shadow+ clutch system
  • Excellent weight distribution with the motor and battery mounted low and center, the motor responds very quickly and offers incredible power for climbing with 75 Newton meters peak out put
  • Older Bosch systems used a 400 watt hour pack but this bike comes with the 25% larger Powerpack 500, you can easily bring the charger to extend rides further because it’s compact,
    relatively light weight and faster than average, putting out 4 Amps vs. 2 Amps on other systems
  • Nice grips, they’re narrow like standard mountain bike grips so you can wear gloves and really control the bar but they offer some ergonomic support and are locking but light weight (the locking screw is under the ergo wedge vs. an end cap)
  • Quality hydraulic brakes with four piston caliper in the front to improve power and distribute heat, both rotors are 180 mm and the levers are adjustable for reach
  • Given the smaller 15 tooth chainring on this and other Bosch powered full suspension mountain bikes, I was surprised that they didn’t put a pulley in to reduce slapping and kickback, I didn’t have any issues during my test ride and they do include a slap guard but it’s an area for consideration
  • Internally routed cables keep the frame clean and reduce the potential for snags and scratches, I like that the top tube is completely clean for transporting with hang style racks
  • The chain is kept on track by the NW sprocket and a bash guard / protector which also keeps pants clear… but who mountain bikes with baggy pants O_o

Cons:

  • The Bosch CX motor is a bit louder than Brose, you can hear a signature whining noise when it operates at high RPM, it’s also limited to a single chainring at this time
  • No seat post dropper here, the combination of longer travel and larger wheel diameter means all-mountain to me and droppers can be really useful for that kind of terrain variety, they cost a bit if you want hidden wiring but there are also cheaper ones too (get the 30.9 mm diameter to fit this ebike)
  • No bottle cage bosses, very few of the Bosch powered full suspension ebikes have managed to fit these because the triangle space is limited (especially on the smaller frame sizes)
  • If and when you need to replace the battery pack, it won’t necessarily come with the same matching decals and I’m not sure how easy transferring them would be, it might not look as good then
  • The stock pedals are lame in my opinion, they are cheap alloy cage style platform pedals that are easily bent up and don’t offer the surface area or traction I prefer for trail riding like this

Resources:

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JimBo
10 months ago

Once again, Court, you provide a nice, thorough review on a helluvan eMTB!

I also noticed that the Bulls FS series don’t come standard with droppers, at least not in the North American market. I’d like to point out another dropper option from Magura – it’s totally wireless!

I’ve been using their Vyron dropper for a couple weeks now, and it’s great once you get used to it. 150mm of travel, $500 retail but I found it for about $260 from this site. Even with $25 or so shipping, it’s still less than the Reverb. Plus that site has a lot of ebike-specific goodies at lower prices than any I’ve found thus far in the US.

Reply
Court Rye
10 months ago

Very nice, thanks JimBo! You’re quite knowledgeable and up to date on this stuff. I really appreciate you sharing these tips ;) I’d like to hear more about this post if you own it, how is it different and what did you have to get used to? Is it slower than a mechanical dropper? How often do batteries need replacement or are they rechargeable?

Reply
Adam
10 months ago

Hey Court, I enjoy your reviews. Keep up the good work! Question here, is this bike tubeless ready?

Reply
Court Rye
10 months ago

Hi Adam! I believe it could be converted easily but would require liners.

Reply

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Asoma64
5 hours ago

You’re right , the Riese and Muller bikes are beautiful and well made , thank you

Alaskan
1 day ago

So I have been researching e-bikes for around town commuting and fun on local trails in Bellingham, Washington which is a rather hilly spot. I have taken test rides on 14 bikes from Kalkhof, Rad, EMotion, Bulls (3), Focus (2), Cube (3), Riese & Muller(3). I have read and watched the video reviews on this site for all the above and at least another dozen more. I do have a bias in favor of German engineered vehicles and have been driving a Mercedes wagon for the past 25 years, currently an e500 4matic wagon.

After lots of careful consideration, I put an order in for a Riese & Muller Nevo Nuvinci GH It comes with the Bosch CX they also have an HS (high speed) with a Bosch Performance motor. They are just under $5000. Riese & Muller bikes come very complete as regards accessories (lighting, fenders, locks, racks) as well as really top flight peripherals (brakes, tires, rims, drive systems, grips, saddles, suspensions, etc.). Build quality is outstanding, designs are interesting and well thought out, engineering seems to be thorough and complete.

I tried both the CX and the HS models in both Riese & Muller as well as Bulls. I found that the CX higher torque performance on hills is something I would be making good use of all the time, whereas the HS version while capable of going up to 28mph with power assist, requires a lot more pedal effort past about 22 mph due to exponential increase in wind resistance...enough to make me less eager to go that fast, especially when it means sacrificing hill climbing ability.

Right after ordering the Nevo, I ended up getting a smoking hot deal on ebay for a really nice Cube (another German brand) so that is what I'm riding now while I wait for the R&M to be delivered. Then we will have two nice bikes for my wife and me to go riding together.

The Cube is great but the Riese & Muller with the Nuvinci drive and Gates carbon fiber belt drive is a very clean, low maintenance option that has a ton of appeal to me. There is some efficiency loss in the Nuvinci drive so you might want to look at the GT Touring models from them as they have traditional gear cassettes and derailleurs. That will give you less frictional power loss for that extra little bit of oomph.

Count on it taking on month minimum, unless you are lucky enough to find a dealer who has just what you want. They offer lots of options and produce them in Germany to your specs. Add in cross Atlantic shipping, dealer set up and delivery an you have a wait that will try your patience. From all reports well worth it though.

Let us know what your decide on.

hikingdad
3 days ago

DAHON MATRIX 26" folding ELECTRIC mountain bike with super quality, hill climbing BMC 600watt V2 motor, Cycle Analyst 2.1, upgraded controller, Thudbuster, extras. I bought a Bulls full suspension ebike, so it is time to let this go.

Most ebikes are set to 15-20amps of power with a cheap controller. They will not get you up a hill or be very fun on a trail. My bike's electronics are upgraded to give you lots of power....and 26mph.

If the ad is up, it is still available. $850 CASH ONLY, no trades. In Thousand Oaks. Email me your name and phone number and a day and time you want to see it, and I'l get back to you asap. Will update or delete below items if sold.

DAHON MATRIX 2009 med. size 26" folding MTB w/ Thudbuster seat post, front suspension fork, Origin 8 Spacebars for comfortable ride. Rear rack with Topeak MTX bag w/panniers. Heavy duty MTB tires. Quick release front wheel. Folding pedals. Cannondale heavy duty kickstand. Folds easily with included hex wrench tool, I hardly ever folded it.
Converted to ebike. you can easily remove the battery box and still pedal with the 9 lb. motor freewheeling. Disc brakes could use new pads.

Will consider selling bike only (without rear wheel)

BMC V2 speed 600 watt motor purchased from Ilia Brouk (ebikessf.com) w/ 7 sp. freewheel. 2 torque arms on rear motor axle.

Great geared rear hub motor. link on BMC motor: https://endless-sphere.com/forums/viewtopic.php?f=4&t=22103
Battery and controller are mounted in center triangle for optimum, low center of gravity. Much better than a rear rack battery mount like Prodeco.
CRYSTALLYTE 36-72v analog controller, upgraded to 35 amp , CLYTE full Twist Throttle (like a motorcycle)
Cycle Analyst 2.1 battery aHr meter/speed computer w/ limit switch to conserve battery.
Ping 15ah 36v Battery with BMS set to 40amps continuous- mounted in custom box in triangle. Comes with charger.
The battery had a good, long life but now goes only about 4-6 miles, depending on how much you pedal. Will need a new battery to go far. I can recommend this : http://www.ebikes.ca/b3614lim-dt.html# an excellent, matched battery for $485 shipped.

Other good battery options are available too.....Ping still makes very good batteries and will make a high current BMS.

Original cost:
Bike: $750
BMC Motor and controller, throttle, Cycle Analyst 2.1 package: $900
Thudbuster seat post: $120
Spacebars $40
Rack and Topeak bag $125
Cannondale heavy duty kickstand. $40
Ping 15 aHr Battery $450

Sell all for $850 FIRM. Buy the brand new battery for $485 and you have a 26 mph, 30-40 mile range, suspension hill climber for under $1350.

Factory specs for bike: Wheel Size : 26"
Weight : 12.9 kg (28.4 lbs)
Folded Size : 35 × 97 × 85 cm (13.7" × 37.8" × 33.2")
Frame : OAX Series, 7005 aluminum, patented LockJaw hinges, replaceable derailleur hanger, integrated head tube
Fork : Suntour NEX, hydraulic damping, lockout
Handlepost :Kinetix Comp, riser, double butted 6061, 31.8 mm
Drivetrain : Front Derailleur Microshift, forged aluminium, for MTB Rear Derailleur SRAM X7, long cage, black Crankset FSA Dynadrive,
Wheels : Front Hub Formula disk, 32H, double sealed Rear Hub Formula disk, 32H, double sealed Spokes 18/8 stainless steel or Sapim Leader, stainless steel (EU) Rims WTB SX24, disc only,
Brakes : Avid BB5, disc
Rider height : M: 167 - 183 cm (5'6" - 6') L: 183 - 193 cm (6' - 6'4")
Max Rider Weight : 105 kg (231 lbs)

Alphbetadog
6 days ago

I have a Bulls FS Enduro with the Brose motor for a little over a year and have never broke the chain and am just about to replace it as it is just out of spec. I ride this bike A LOT on rugged mountainous trails. Also have a Haibike for over 2 years and have only broke a non-ebike chain.

I always carry pins & a link, along with patches, replacement tube, inflator, etc, and have never had to use them for myself but have bailed out many others on the trail that where unprepared. It's been sort of like a reverse "Murphy's Law".

Alphbetadog
6 days ago

I have a Bulls FS Enduro with the Brose motor for a little over a year and have never broke the chain and am just about to replace it as it is just out of spec. I ride this bike A LOT on rugged mountainous trails. Also have a Haibike for over 2 years and have only broke a non-ebike chain.

I always carry pins & a link, along with patches, replacement tube, inflator, etc, and have never had to use them for myself but have bailed out many others on the trail that where unprepared. It's been sort of like a reverse "Murphy's Law".

LimboJim
1 week ago

My Bulls FS3 eMTB has a Brose motor, same as your Turbo Levo, Jim. Sure, Specialized "custom-programmed" the motor's software, but it's still cranking the same 90Nm of extra torque through the drivetrain. I also own a Haibike Sduro Allmtn+ with a Yamaha (80Nm), and a Motobecane w/Shimano (75Nm). My friends and I have put hundreds of trail miles on all three, and we've broken a few chains.

We've all been mountain biking since the early '90s, and consider ourselves to be experienced riders who know how and when to shift. eMTBs, however, are a different story. I find that they're far more susceptible than unassisted MTBs to bending chain links when shifting under any kind of load and/or the slightest cross-chaining, and are totally intolerant of standstill shifts (especially when caked in dried mud, which makes everything stickier). Of these three ebikes, the Bulls w/Brose has been the most prone to chain breaks, even when freshly cleaned and properly lubed. I suspect it's because of the motor's higher torque (it's also the heaviest of the three).

My 2002 Stumpjumper could go indefinitely without lubing its chain, and did 15 years ago when I first got it. One of my buds now wants to buy his own eMTB, which is great, but he only cleans his current MTB semi-annually, and maintenance is not something he does frequently, either. I told him what I'm saying to you - if you expect to treat an eMTB just like a mountain bike, you'll likely be disappointed. For me, pedal assist amplifies the fun factor by at least 10, but also requires three times the maintenance.

That's a trade-off I'm willing to make.

Dan Dialogue
1 week ago

Hi Scott,

It's converting the front crank, either a 2 or 3 chain ring to a single ring. You can check out my post in the Bulls forum here:

https://electricbikereview.com/forum/threads/my-unintentional-1x11-conversion.15912/

You only need post adapters to increase the rotor size. I'll take some photos and post them back here.

Dan

Scott Adams
1 week ago

Nice photos.

Curious what "converting to a 1X" means?

What all is involved in increasing the rotor diameter- is it necessary to custom weld the caliper mounts into a new position?

Riding an ebike at night is fantastic.

Dan Dialogue
1 week ago

HI All,

Just roaming around the site and found this thread. I've posted in other threads but never really took the opportunity to introduce myself. My name is Dan and I reside in a suburb of SLC, UT. I currently own two bikes. The first is a 2015 Cannondale Trigger 4. It's my "analog" bike and the one I ride in areas where I can't legally ride my eBike, like Ski resort riding, MTB only trails in Moab, forest and BLM land.

My regular ride is a 2016 Bulls EVO E-Stream FS3 and it has been fantastic. Especially since converting it to a 1X, installing a dropper post and increasing the rotors to 203mm. It has allowed me to ride longer, to keep riding with my 23-yr old son and to ride without knee pain.

I recently bought a couple of Bontrager ION 800 R LED lights and have been night riding. Terrifyingly awesome!

Scooteretti
2 weeks ago

@Boca, sorry to hear you are going through these issues. Normally things are really easy where it would take a few days to diagnose the issue and fix it.

I'm very surprised that the box wasn't opened, batteries inspected and charged up fully prior to giving them (one) to you. This is what happens I guess when steps get missed.

But happy that the new battery is up and running and the 2nd one is on it's way to you.

As mentioned above, our expereince with Bulls has very positive and customers love their bikes.

safe riding & best regards,

Will
shop.scooteretti.com

Boca
2 weeks ago

Hey guys, thanks for the new interest in my issue.

My bikes have been in a shop near Miami at the request of Bulls for evaluation. Communication with the shop has been difficult due to a language barrier, but they are sincere. Communications with Bulls has been on and off, but also sincere. The tech guy at Bulls in California is probably covering the whole country and has limited time to communicate, but here's the deal:

Bulls wanted the batteries hooked up and tested according to their protocol. The shop did that but one came back "incomplete and timed out." Bulls had a hard time getting the shop to finish that one, but Bulls finally decided to replace both batteries. The shop earlier said they tested fine, but they, like me, were unable to charge them with my chargers or theirs. Nobody is telling me what the problem is, but I finally pried some info out of the shop. They said there was a manufacturer lot of bad batteries wherein a case screw was grounding out one of the cells. So, my theory had been that my chargers were tripping out. I could hear them click when hooked up to the battery. So, I guess the batteries were shorted. The mystery is why two batteries would short out at the same time. I had had problems with one of the batteries from day one. It would never charge over 80 %, but both were chargeable until I ran them down to 20% and 40%.

The shop told me the new batteries had come in. It is an hour's drive for me. I got there and the box contained only one battery. The shop felt bad about it and said they would have the second battery delivered to me when it comes in. When I got home I charged the battery. It went to full charge and the charger acted normal. Looks like the chargers are OK - just a bad battery. Now if I can get the second battery I'll be good to go. UPS says the battery has been at their facility In Jacksonville since Feb 4 with no updates. Geez...what's going on?

Scooteretti
2 weeks ago

@Boca indeed would love to hear to outcome. Sounds like a BMS issue within the battery. Multiple known chargers that are know to work that don't work when put on a battery would indicate a poor internal connection or a bad BMS. My guess is BMS.

Keep us posted on the outcome.

I am a big fan of the Bulls bikes and they are reliable. Liek anything nothing is 100% perfect but you at least have a brand that offers great support and a strong customer service attitude. They will get you back up an running.

regards,

Will
shop.scooteretti.com

Craig Crowder
5 months ago

I have a Bulls SIX50+ E FS 3 which has a Bosch Performance line CX. I've ridden the bike about 50 times for about 400 miles total (I ride about 4 times a week) since I bought it in June 2017. In the past three weeks the motor and display unit (Intuvia) has powered off on it's own while riding 4 different times. I press the power button and it powers back up after about a minute. No error code is displayed. Is there some trick to see if there is a hidden internal error code somewhere? Any help is appreciated, it's an hour drive one way to the dealer I bought it from.

Craig Crowder
7 months ago

Affected models:

-2017 BULLS E-STREAM EVO 2 27.5 PLUS
- 2017 BULLS E-STREAM EVO 2 FS 27.5 PLUS
- 2017 BULLS E-STREAM EVO 3 27.5 PLUS
- 2017 BULLS E-STREAM EVO 3 29
- 2017 BULLS E-STREAM EVO 45 FS 27.5
- 2017 BULLS CROSS LITE E
- 2017 BULLS DAIL E GRINDER 45
- 2017 BULLS SIX50 E 1.5
- 2017 BULLS SIX50 E 2 STREET
- 2017 BULLS SIX50+ E FS 2 27.5
- 2017 BULLS SIX50+ E FS 3 27.5

Craig Crowder
7 months ago

SR Suntour has a "corrective action" on the cranks depending on the Bulls bike model number and the model number of the crank arm. From Suntour:

"SR SUNTOUR has found that the cranks supplied on some BULLS E-Bike Models(See attachment for complete list) tend to loosen over time.
Re-tightening the crank only works for a short time then becomes loose again. SR SUNTOUR has therefore decided to have all crank arms and bolts
replaced."

Craig Crowder
7 months ago

I have a 2017 Bulls SIX50+ E FS 3 that I've ridden about 25 times for a total distance of approximately 250 miles. My 10.5 mile loop has a 22 degree grade for about mile and then has some shorter steeper climbs as well. Two days ago I had the firmware updated from 1.6.0.0 to 1.7.0.0 which gave me the new eMTB mode. I didn't like it at first but after a couple miles I liked it better than regular sport mode. It does reduce the number of pedal assist level changes and I was hoping they had fixed the surging problem when in a larger gear on the flats but they didn't. I've only been on one 10.5 mile ride with the new mode so haven't had a chance to determine the effect on range. Someone else reported that they saw an increase in battery consumption but I didn't see that on my first ride. I'll post again once I've ridden with the new mode a few more times.

Craig Crowder
7 months ago

My 2017 Bulls SIX50+ E FS 3 was updated to the new eMTB mode a couple days ago. Walk assist still works just fine, It was not disabled.

Craig Crowder
7 months ago

I have a 2017 Bulls SIX50+ E FS 3 that I've ridden about 25 times for a total distance of approximately 250 miles. My 10.5 mile loop has a 22 degree grade for about mile and then has some shorter steeper climbs as well. Two days ago I had the firmware updated from 1.6.0.0 to 1.7.0.0 which gave me the new eMTB mode. I didn't like it at first but after a couple miles I liked it better than regular sport mode. It does reduce the number of pedal assist level changes and I was hoping they had fixed the surging problem when in a larger gear on the flats but they didn't. I've only been on one 10.5 mile ride with the new mode so haven't had a chance to determine the effect on range. Someone else reported that they saw an increase in battery consumption but I didn't see that on my first ride. I'll post again once I've ridden with the new mode a few more times.

Craig Crowder
7 months ago

I've had my Bulls SIX50+ E FS 3 about 3 weeks now and I've ridden it about 16 times for a total of 170 miles. I've been very happy with the ride and performance. Luckily for me the LBS notified me that the manufacturer notified him of the crank arm bolts coming loose. I checked them and they were very loose and I tightened them. About 4 rides later the left crank arm came off while I was riding and I was lucky to be sitting on the saddle when it came off. I was able to find the bolt and put back together. The LBS had said that he was waiting for a "Bulls" fix but I guess they haven't got back to him yet. I'm thinking of using blue loctite after I clean the threads, what do you think?

****UPDATE 8/4/17****

SR Suntour has a "corrective action" on the cranks depending on the Bulls bike model number and the model number of the crank arm. From Suntour:

"SR SUNTOUR has found that the cranks supplied on some BULLS E-Bike Models(See attachment for complete list) tend to loosen over time.
Re-tightening the crank only works for a short time then becomes loose again. SR SUNTOUR has therefore decided to have all crank arms and bolts
replaced."

Affected models:

-2017 BULLS E-STREAM EVO 2 27.5 PLUS
- 2017 BULLS E-STREAM EVO 2 FS 27.5 PLUS
- 2017 BULLS E-STREAM EVO 3 27.5 PLUS
- 2017 BULLS E-STREAM EVO 3 29
- 2017 BULLS E-STREAM EVO 45 FS 27.5
- 2017 BULLS CROSS LITE E
- 2017 BULLS DAIL E GRINDER 45
- 2017 BULLS SIX50 E 1.5
- 2017 BULLS SIX50 E 2 STREET
- 2017 BULLS SIX50+ E FS 2 27.5
- 2017 BULLS SIX50+ E FS 3 27.5

Craig Crowder
7 months ago

2017 Bulls SIX50+ E FS 3 - Crank arm coming loose: I've had my Bulls SIX50+ E FS 3 about 3 weeks now and I've ridden it about 16 times for a total of 170 miles. I've been very happy with the ride and performance. Luckily for me the LBS notified me that the manufacturer notified him of the crank arm bolts coming loose. I checked them and they were very loose and I tightened them. About 4 rides later the left crank arm came off while I was riding and I was lucky to be sitting on the saddle when it came off. I was able to find the bolt and put back together. The LBS had said that he was waiting for a "Bulls" fix but I guess they haven't got back to him yet. I'm thinking of using blue loctite after I clean the threads, what do you think?

goatbear
10 months ago

Hi All,
I recently purchased a Bulls six50+ E FS 3. Picked it up in Boise,Id from Boise Electric Bikes. I haven't had a chance to test it out on trails much, as I'm new to the area and don't know where many are. My commute to work has been much faster and plesent though. I did get a flat the 1st day from goat thorns on my rear tire, and the LBS doesn't carry any 27.5 tubes... Anyone got any recommendations for trails in Idaho's magic valley or ways to protect against goat thorns.

Thanks,
Doug

Gras Hüpfer
4 months ago

is it possible to upgrade the bike with a rock shox reverb?

Micah Watts
8 months ago

Thanks for all the videos. Just a suggestion, maybe spend less time on the ins and outs (specs) of the motors specifically and how you prefer one over another because of your personal preference and just direct viewers to ONE Video (maybe a pop up on the screen option) that discusses each line of motor pros and cons as well as your preferences so that each Bike Review focus's on what really matters to the viewer and that is how the Bike actually performs in its price segment and in the real world? Maybe compare it to other bikes in its segment. Again IJMO but it's a lot of wasted review time talking about repetitive information.

Nick Read
10 months ago

I have the specialised turbo levo expert 2017
It's amazing would def recommend to anybody , it's that good !! Eats all terrain and fills you full of confidence ...

Anew Madrid
10 months ago

A mountain bike review not even done in the mountains. Interesting. I saw someone riding one of these by the Muir beach. was intrigued. would be nice to actually see it perform on some singletrack or up fire roads.

Martian Megafauna
10 months ago

I have also made that point in previous comments on Court's videos--if you are testing an actual MTB, hit the trails.

Martian Megafauna
10 months ago

I am curious to hear from people who have had eMTBs out on actual challenging trails for a while.

Even with the additional weight being centered and fairly low in the frame, I am wondering how much of your usual riding
style and techniques suffers from the extra 25 pounds of mass. When I began riding MTBs, I found that the vertical component of riding–over logs, nasty rocks, gaps, jumps, etc.–was the most challenging. I cannot imagine what an additional 25# would have done for my accumulation of scrapes, bashes, and bruises.

I am also curious about how the electronics and motor will hold up to the abuse/use a drivetrain gets out on
real trails. This is probably especially true for novice riders: after my first two seasons of riding, the only original parts of
my MTB still going were the frame, crank, stem, bars, and of course my Time pedals. I am wondering how bomb-proof the
average electronics on these MTBs are. Any thoughts?

Nick Read
10 months ago

Martian Megafauna
I have the specialised turbo levo expert 2017
It's amazing would def recommend to anybody , it's that good !! Eats all terrain and fills you full of confidence

Karl Fonner
10 months ago

Let's see you take it up a really really steep hill

Larry Conger
10 months ago

Nice review Court u going to the Sea otter classic to check out some ebikes I hope

milliamp
10 months ago

It looks like Luna Cycles started selling ebikes in October 2016 and some of their bikes look like decent bang for the buck. The "Luna 5000 Carbon Fiber 2000w Mid Drive Fat EBike" is probably their most expensive bike at $3500 but it looks amazing. They have really reasonable prices on spare batteries (48v 13.5Ah for $375). The "Luna Aguila Hard Tail" looks half decent too for a $1800 road bike that comes stock with a 650 watt battery. Right now it looks like Juiced (Hyperfat?) and Luna are probably in the running for my first eBike purchase. Could you review a couple Luna bikes?

milliamp
8 months ago

Well I decided to go with a Juiced Hyperfat so I definitely don't work for Luna. Luna still looks like solid bang for the buck but I'm looking for more people to take the plunge before me and review them. To be fair the Juiced Hyperfats aren't shipping yet so I'm taking a chance there too.

G Henrickson
8 months ago

Your closing sentence offers a good question yet the remainder makes me wonder if you work for Luna.

Mark Elford
10 months ago

Slikk whip.

Peter Paul Patalinghug
10 months ago

do some review to kids elactric bike please 24 inch

LongIslandADED.
10 months ago

by any chance will you be doing a review of the Bimoz mid drive engine anytime soon ?

ForbinColossus
10 months ago

@13:38 Great footage of the chain shifting between cogs with the scenery in background. Did you feel the shadow plus did anything? Also, Bulls managed to tilt the Bosch motor so much that I first thought it was a Brose motor.

Flatslide
10 months ago

The derailleur clutch is designed to reduce chain whip caused by rapid fore and aft movement of the jockey wheel cage over rough terrain. That's all. Shifting is slightly 'nicer' with it disengaged, but if like me you enjoy mercilessly thrashing your bike on aforementioned terrain, the clutch does a great job and disengagement is only for wheel removal.

LongIslandADED.
10 months ago

ForbinColossus by any chance have u looked at the Bimoz mid drive engine?

Alex
10 months ago

beautiful piece of engineering!

F r e e l e e
10 months ago

I would have the more powerful Yamaha motor and its max 120 RPM any day.

F r e e l e e
10 months ago

"The torques rated by these companies are very inaccurate"

Making up numbers doesn't change the fact the Yamaha is more powerful.

BULLS Bikes USA
10 months ago

The Brose motor is rated at 90Nm torque but I can assure you it does not feel as powerful as the Bosch CX. The torques rated by these companies are very inaccurate as there is not an standard industry method to calculate it. Most of the people who has tried both motors will tell you the Bosch is more powerful.

F r e e l e e
10 months ago

The Yamaha motor is more pokey, with 80Nm on offer. Brose CX is only 75Nm so I was right and have made a fool of Bull Rubbish Bikes.

BULLS Bikes USA
10 months ago

The Bosch CX is more powerful than the Yamaha

Jeff Perteet
10 months ago

Bulls bikes look great and that front suspension performed so smooth in the vid

TinyFPV
10 months ago

Great review as usual !

CLOTHED IN SHADOWS.
10 months ago

If you could only choose one ebike motor, what would it be, ( Bosch, brose, Yamaha, bafang, or MAC) ?.

Larry Conger
10 months ago

Clothed in shadows u guys are retarded the Bosch system is superior enough said SMH

Chauncey Smith
10 months ago

Go with bafang because they have a trollal and they seem better

CLOTHED IN SHADOWS.
10 months ago

Chauncey Smith I like bafang a lot as well but, I'm still trying to figure out, as well as decide which motor I should go with because, the Bosch systems are quite excellent and, the brose, Yamaha and MAC motors perform very well too.

These are things I'm still examining.😕😕😕😕😕

Chauncey Smith
10 months ago

Clothed in shadows bafang for me.

USSR_APTuCT
10 months ago

The dream of the mogulds)

FRANK ROBY
10 months ago

Nice bike great review as usual Court .

Bismuth Crystal
10 months ago

Oh god it's hideous.

Bismuth Crystal
10 months ago

If you think it looks good, I certainly respect your opinion. But being a mountain bike is no excuse for ugliness.

Martian Megafauna
10 months ago

Its a mountain bike, not bar cruiser.

ElectricBikeReview.com
10 months ago

Well, at least people will see you and get out of the way ;)

C0deH0wler
10 months ago

I'm hideous. Even light thinks so. My face is just a void of black.