BULLS E-Stream EVO TR2 27,5. Bulls electric bike

Fly Up and Down Trails on the Bulls E-CORE

Price: 5,999Weight: 50 lbs. (medium)Battery Capacity: 500WhMotor: Shimano STePS 250 watt/70 NmTravel: 150mmFork Travel: 150mmThe right bike for: extending your day in the saddle on trail rides with long, steep climbs

Despite recent improvements in the ascending abilities of longer-travel trail and enduro bikes, climbing usually comes second to descending prowess. Without the luxury of a chair lift, pedaling to the top of the mountain uses energy that could otherwise be spent on longer days in the saddle. For some, that’s just fine. For others, there’s the Bull’s E-CORE Di2 FS 27.5. It’s a 150mm-travel e-bike that can tackle big descents, rides great on flowier trails, and provides a generous boost for the trip back to the top.

The pedal assistance comes from Shimano’s compact STePS E8000 motor that weighs only 6.2 pounds and offers assist up to 20mph. Shifting is motorized too, with Shimano’s exemplary XT Di2 drivetrain providing the most precise and consistent shifts a mountain bike can have. The fun comes from the E-CORE’s 150mm of front and rear travel courtesy of a RockShox Yari fork and Deluxe RT shock. Both be locked out for on long, fire-road type climbs, though on an e-bike that feature feels less necessary.

Five Cool Details

Bulls E-Core Detail Gallery

Big Travel

The 150mm-travel rear suspension offers an extra smooth ride

Dropper Post

The RockShox Reverb dropper helps you descend more confidently.

Controlled Stopping Power

Magura four-piston front caliper provides greater control

Plus Tires

Schwalbe 27.5 Tires have good grip and low rolling resistance

Downtube Battery

Downtube battery placement distributes weight evenly.

The Bulls Family

In addition to the E-CORE family, Bulls offers seven other full-suspension e-bike models. The other bikes cover a range of categories—fat bikes, 29ers, women’s specific—and use most of the popular motor systems, including Bosch, Brose, and Shimano.

In the E-CORE line, Bulls offers the bike reviewed here, and one more option, the E-CORE EVO EN Di2 27.5, which has 180mm front and rear travel and costs and additional 1,800. This model uses a RockShox Lyrik fork, Fox Float X2 shock, DT-Swiss wheels, and Shimano Saint brakes that are better suited to downhill riding. Both versions of the E-CORE come with the Shimano E8000 drivetrain.

This content is imported from poll. You may be able to find the same content in another format, or you may be able to find more information, at their web site.

Light and Compact Shimano STePS Motor

The E-CORE Di2 FS 27.5 is built around Shimano’s STePS motor, which is one of the smallest and lightest (6.2 lbs.) available. It’s also one of the narrowest also, so the pedals are no further apart than they are on an acoustic Shimano drivetrain. With the STePS motor, this bike looks almost like a non-powered mountain bike, and a little less like some e-bikes.

bulls, e-stream, electric, bike

The STEPS motor has three assist modes: eco, trail, and boost. In eco mode, the ride feels natural and almost as if there is no pedal assist. It won’t give you the power you need to get up anything extraordinarily steep, but it offsets the bike’s weight so riding on trails feels almost like any other bike. The trail and boost modes take the assistance up a notch for steeper climbs, or just more speed. There’s also a handy walk mode that helps you push the bike up steep or technical inclines that you can’t quite clean. It’s easy to toggle between the modes thanks to the switch on the left side of the handlebar.

The display shows the current assist mode, with a distinct color for each that makes them identifiable with a quick glance. It will also show speed, battery life, and current gear selection.

3 Great E-Bikes for Different Types of Rides

3,200 Benno e-Joy

So joyful! Looks like a vintage Italian scooter and is just as fun to zip around town on.

10,000 Pivot Shuttle

Skip the lift to ride up and romp down big mountains all day with this elite-level e-mountain bike.

4,650 Road E Pro

We rode our favorite local roads—and safely sat in group rides—with this smooth-sailing machine.

Tech to Compliment Shimano STEPS

The 35mm stanchions on the RockShox Yari RC help the fork from deflecting when you bang into rocks or send this 50 pounder off a drop. 2.8-inch-wide Schwalbe tires give extra traction and cushion without too much extra weight or rolling resistance.

Slowing this beast down is a Magura blend: a four-piston caliper up front, and a two piston caliper in the rear. The two piston rear caliper saves a bit of weight, while the four-piston caliper should offer more power and fade resistance.

bulls, e-stream, electric, bike

The Di2 electronic drivetrain is powered off the motor’s battery, so there’s no need for a second battery, which saves weight and space. Plus, one less thing to charge is always welcome.

Ride Impressions

The E-CORE Di2 FS 27.5 is a long-travel bike with plus tires and burly components. Thought it looks like it’s ready for the burliest and most technical terrain, it works best on smooth and flowing trails.

On those trails, this bike was a blast. The boost and trail modes give immediate, powerful assistance as soon as you start to turn the cranks, and help make climbing almost as much fun as descending. The smooth suspension helped the Bulls fly through choppy sections with little trouble.

But while generous travel and e-assist would seem advantageous for riding rock gardens and technical trails, it was a challenge to ride them cleanly on the Bulls.

I really had to fight the weight, and in some cases the power surge, in the technical stuff. It was often difficult to control, which made traversing technical sections even harder than they are on a non-assist bike.

I did discover that lowering the assistance level to eco helped me ride some technical sections more cleanly. In the higher-assist modes, the bike would lurch when I turned the cranks, which made picking my way through tricky sections of trail difficult. The lower-power Eco mode offered smoother acceleration, and helped offset the bike’s weight.

While I eventually learned how to manage the Bulls on more technical trails, I still found myself stopping and walking more than I would have liked. Eventually, I confined my rides on the Bulls to trails where it performed best: smoother trails that required more energy and endurance than technical ability. On these trails, having the assistance meant I could do more runs on the funnest downhills.

The Shimano Di2 electronic shifting on the Bulls is quick and precise and the gear range never had me looking for anything extra. Like other e-bike riders, in some situations I would shift the motor’s assist mode instead of gears, backing down the assist when more finesse was needed, and bumping it back up when the trail opened up. The gear shifter and assist-mode switch use the same smooth and light action Shimano Di2 rotating paddles, which makes for some nice consistency at the controls. I found the integration of the STePS system onto the handlebar worked well and was easy to use once I sorted out its finer details.

bulls, e-stream, electric, bike

There’s a lot to like about the Bulls ECORE Di2 FS27.5: a powerful motor, sharp shifting, great brakes, confidence-inspiring tires, and smooth suspension. And on the right trails, it is an stirring bike to ride, providing the pure exhilaration of speed that’s possible on an e-bike.

Matt grew up riding BMX in the UK and has ridden across Europe and the US, and now he’s putting those miles to use testing road, mountain, and city bikes for Bicycling. His ideal ride includes includes steep rock gardens, sweeping berms, and fast descents followed by a cold beer.

BULLS E-Stream EVO TR2 27,5

BULLS E-Stream EVO TR2 27.5 is the best-equipped all-suspension trail electric bike from BULLS. Highly recommended for all riders who prefer bike paths and light terrain. Thanks to the powerful Brose Drive S-Mag 90 Nm center engine, you can handle even heavier terrain on this e-bike. The large-capacity integrated 750 Wh battery provides sufficient energy even for a longer ride.

Main attributes of E-Stream EVO TR2

BULLS E-Stream EVO TR2 27,5

The latest incarnation of the e-bike BULLS E-Stream EVO TR2 27.5 is the ideal choice for sporty cycling and off-road riding. Very comfortable fully sprung chassis frame BULLS Lytro 35 Supreme SL LOR Air CTS Boost with a stroke of 120 mm in combination with the rear shock absorber provides sufficient comfort.Large-capacity integrated battery 750 Wh with a guarantee of 1.000 full charge cycles has enough energy for a longer ride.

The heart of this e-bike is the powerful Brose S-Mag 90 Nm center engine, which is considered by professionals to be the best engine today. It excels in quiet operation and very sensitive course of dosing help. With the BT Connect plug-in, you can then customize of each level

E-Stream EVO TR2 27.5 features a precise 12-speed Sram SX Eagle system and high-quality hydraulic Shimano BR-MT420 / BR-MT410 disc, 180/180 mm. You will also appreciate the unique Monkey Link magnetic system for easy expansion with accessories such as lighting, fenders, drinking bottle etc.

FRAME MATERIAL Hydroformed aluminum 6061 WHEEL DIAMETER 27,5 ENGINE Brose Drive S-Mag 25/90 Nm, 250 W, 410 % (2,90 kg) BATTERY SuperCore 750 Wh: 37,5 V / 20 Ah / 1.000 full charge cycles (3,80 kg) CHARGER BMZ for Brose 4.5 A (6.5 hrs. to 100% charge SuperCore 750 Wh) DISPLAY Bloks 14d FRONT FORK BULLS Lytro 35 Supreme SL LOR Air CTS Boost, 15LH, 120 mm REAR SHOCK SR Suntour UNAIR LOR8, 120 mm BRAKES Shimano BR-MT420 / BR-MT410 hydraulic disc, 180/180 mm SHIFTERS Sram SX Eagle SL-1-A1, 12 speeds REAR DERAILLEUR Sram SX Eagle RD-SX-1-A1, 12 speeds CASSETTE Sram CS-PG1210-A1, 11-50T CRANKSET Sram 34T/ FSA PEDALS BULLS MTB HANDLEBAR BULLS aluminium STEM MonkeyLink AS-ML1 SADDLE BULLS MTB SEATPOST Limotec Alpha 1, adjustable HUBS Shimano HB-MT400-B/ FH-MT510-B RIMS BULLS Eccentric 30, tubeless ready TIRES Schwalbe Nobby Nic Performance, Addix 65-584/ 27,5 x 2,60 WEIGHT 25 kg LOAD CAPACITY 130 kg

Brose S-Mag 90 Nm

  • Above-standard torque 90 Nm
  • High real performance with support up to 410%
  • Adjustable power dosing (optional)
  • It does not resist when the engine is switched off
  • Very quiet and refined vibration-free operation
  • Top German quality and reliability

The highly sought-after Brose Drive S-Mag center drive, which is the most highly rated by the professional public, is the quietest electric motor used in electric bicycles.

Thanks to accurate and sensitive scanning, it very naturally supports the rider in every driving situation and provides him with a unique driving experience.

Docking system Monkey Link

All BULLS e-bikes with a Brose S-Mag center engine are equipped with the Monkey Link magnetic docking system.

bulls, e-stream, electric, bike

Thanks to this unique system, you can easily snap on the front and rear lights, drinking bottle, fenders with integrated rear light and other equipment.

The Monkey Link magnetic docking system is powered by an integrated battery. It is therefore not necessary to charge or change the batteries in the lighting. All you have to do is click and go. The control is already built into the display panel.

All Monkey Link components are secured with a mechanical lock when snapped on. So there is no danger of losing them even during a wild ride 🙂


Unfortunately, this e-bike model is no longer on our offer. Please, look into the category, if you can’t find one that may suit you, or call us on 420 777.797.011 and together we will come up with the best alternative.

Why this e-bike?

Monkey Link is a unique magnetic system, thanks to which components such as the headlight, taillight or fenders can be easily mounted or removed. Power is supplied directly from the battery and is controlled through the display.

Original Li-ion battery 36V for e-bikes with Bosch central drive. The e-bike with a frame battery has an ideal weight balance, the battery does not have any negative impact on bikes‘ centre of gravity due to its location. Battery life is around 15.000. 25.000 km or 5. 9 years.

Click to display the e-bike range calculator

E-bike range calculator

We are sorry 🙁

Because of a technical issue we were unable to calculate the range. Please, try it again later.

(Setting specific assistant mode, electro-technical state, battery age, ambient temperature, aerodynamics and driving technique could affect the overall range)

The BULLS SIX50 E1 e-bike is ready for even the most demanding rides. With a powerful Bosch Performance Line 250W motor and a Smart battery positioning, the e-bike has an optimal weight distribution and is perfectly handled in any terrain. For maximum control, the SIX50 E1 e-bike is equipped with hydraulic disc brakes, which ensure the best braking force, even in the rain.

Do you need advice on choosing the right e-bike? Use our guide to choosing e-bikes or contact us directly.

BONUS K TOMUTO E-KOLU: služba v ceně 2090 Kč nyní pouze za 490 Kč. U elektrokol nad 80.000 Kč doprava ZDARMA. Elektrokolo vám expresně (cca do 3-5 dnů) dodáme a bude připravené k jízdě.

Kompletně seřízené a otestované elektrokolo doručí přepravní služba přímo až k Vám.

Zdarma od nás dostanete: Detailní předprodejní servis, zajetí kola mechanikem, kontrolu baterie a nabíječky. Dopravu kompletně složeného elektrokola (vy si pouze našroubujete pedály) ve speciálním 5-ti vrstvém extra velikém kartónu. Tento doručovací box zasíláme výlučně spediční službou TOPTRANS. Kam si řeknete, v rámci Česka i Slovenska. I na dobírku.

Motor Bosch Performance Line

The ideal choice for ambitious eBikers. A highly balanced, high-performance system with a maximum torque of up to 65 Nm turns the rider into an adventurer and provides the required power at any time.

Bosch Purion Display

Purion is a minimalist on-board computer for anyone who demands sleek look of handlebar whether it is for City or off-road use. You can conveniently get all the important information at the touch of a button while riding with both hands remaining on handlebar. Five different riding modes give you the right support in every situation. The display is supplied with cabling, handlebar holder and is available in two colors.

BULLS is one of the world’s leading manufacturers of e-bikes. They introduced the first e-bike in 2010 and since then they are poving to be experts every year with new models just getting better and better. They are best klnown for their great combination of quality, equipment and beautiful design. Quality and precise engineering is obvious right from the start.

Very popular are off-road all-suspension eMTB e-bikes with the latest motors and high battery capacity.


Drive type

Capacity and battery type

Frame type and material

Front fork


Type and brand of brakes


The stem



Seat post



Bosch Performance Line 250W
400 Wh
SR Suntour XCM DS HLO, 100 mm
Shimano Deore RD-M592 SGS, 9 speeds
Tektro HD-M275 hydraulic disc, 1
STYX Ace of Pace 27,5×2.25

Extreme Bull K6 Electric Bike

The Extreme Bull keeps getting better with the release of the K6. It’s the first of its kind with a unique form factor inspired by sitting scooters but with a far more relaxed riding position and lower center of gravity. Combined with the extreme power this makes the Extreme Bull the perfect scooter for mobbing around town! Our new K6 version now sports a more refined frame, upgraded suspension, and higher voltage LFP battery.

Batch 2 has arrived! Now with Samsung 40T cells.

This Bull Always Sees Red!

Running on two powerful 3500 watt motors the Extreme Bull lives up to the name! Like a charging bull, it can reach 50 mph. while the 2900 watt hour 134v battery keeps riding for 50 miles of practical range

Note there is a 500 shipping surcharge for the bull due to the nature of it need to be ships with freight. This fee is waived for pickup in San Francisco, California.

Due to credit card processing fees, cancellation of a preorder will be subject to a small fee that we are hit with when the order is accepted

Ride with peace of mind with Alien Care

Alien Care provides free consumables such as tires, inner tubes, bearings and brake pads.

Alien Care provides everything in Alien Care as well as full comprehensive crash coverage.

Why choose Alien Rides?

  • ➔ Free Alien Rides sticker with every vehicle purchase.
  • ➔ The best warranty out there. You’ve got two years of a world class warranty for PEVs, providing you with the parts you need to keep rolling.
  • ➔ Our unique rides have competitve pricing, great value, and providing amazing fun.
  • Free tire sealant treatment for your PEV prior to shipping.
  • Discounted labor rates.
  • Free inner tubes, tires, bearings, brake pads as needed.

Alien Care Terms ConditionsGet Alien Care Basic For 20/month

  • Comprehensive crash insurance for your PEV.
  • Free tire sealant treatment for your PEV prior to shipping.
  • Discounted labor rates.
  • Free inner tubes, tires, bearings, brake pads as needed.

Alien Care Terms ConditionsGet Alien Care Plus For /month

Item added to cart successfully.

Not interested in our PEV coverage plans?

Leave a Comment