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The E-STREAM EVO 4 27.5 PLUS is a top-draw trail and off-roader. The high-torque BROSE motor is capable of taking you to the top of almost anything, featuring 120mm travel Rock Shox Revelation RC Boost Solo Air suspension, Magura hydraulic disc brakes provide ample stopping power if your nerve cracks on the way back down! As with all BROSE powered e-bikes when switched off or at speeds over 27.5kmh the 90 Nm BROSE e-bike drive system is disengaged completely so does not cause any pedaling resistance. 

If you’d like a test-ride please call in at our London, Leicester or Suffolk branches, or email to arrange a date.

Motor Power
Battery Location
In Frame, removable
< 110
Battery Chemistry
and Capacity

Li-Ion, 650 Wh
(37 Volt x 17.5Ah)

650 37 17.5

Electric bike frame size guide

Inside leg range Frame size
24 - 29" (61 - 74cm) 14" (35.56cm)
25 - 30" (64 - 76cm) 15" (38.1cm)
26 - 31" (66 - 78cm) 16" (40.64cm)
27 - 32" (69 - 81cm) 17" (43.18cm)
28 - 33" (71 - 84cm) 18" (45.72cm)
29 - 34" (74 - 86cm) 19" (48.26cm)
30 - 35" (76 - 88cm) 20" (50.8cm)
31 - 35" (79 - 88cm) 21" (53.34cm)
32 - 37" (81 - 94cm) 22" (55.88cm)
33 - 37" (84 - 94cm) 23" (58.42cm)

 E-STREAM EVO 4 Hard Tail 27.5 PLUS

bulls electric mountain bike EVO 4 27.5+ Brose


Rotwild electric bike motorWith a whopping 90Nm BROSE toque on tap it has a huge power advantage over its non-Brose rivals.

The beating heart of this BULLS is the peerless BROSE S Drive Unit. For 2018 the Brose has new software giving more low-speed torque and smoother power delivery across all speed ranges. Its main ingredients are aluminum, magnesium, experience, enthusiasm and …helical epicyclic gears! Designed in Germany, its made there too.

Where other well known e-bike motors are built to a price point, the Brose S is designed and manufactured to a quality standard, incorporating precision engineered helical epicyclic gears. These are much more expensive to manufacture but offer dramatic performance and wear rate improvements over the cheaper spur gear tooth profiles that the completion use.

In the simplest terms spur gears transfer power from the driving gear to the driven gear via only one or two teeth at a time, whereas with helical gears power is transferred by three connecting teeth at a time. This results in less wear, less noise, less friction and a smaller and lighter drive unit.

Despite its small physical size the BROSE S produces a market leading 90 newton meters of torque. It does this quietly, reliably and without fuss. The company’s sensor concept is the only one of its kind on the market today: it measures rider pedal force no fewer than 420 times a second, delivering smooth, vibration free assistance.

Brose Drive Technology is a division of the Brose Group, one of the most innovative and successful suppliers to the international automotive industry, employing some 22,000 employees – 2,500 of them engineers – at 57 locations in 23 countries around the world. Their annual turnover exceeds €5 billion. Last year Brose manufactured 100 million electric motors. They know what they’re doing.

Decades of experience specialising in mechatronic systems for the automotive sector mean they’re perfectly placed to produce this innovative e-bike drive unit. Development and production of the Brose e-bike motor is carried out entirely in-house at their Berlin engine plant, where a dedicated team of engineers design, build and test the system at their purpose built e-bike center of excellence .


The removable Li-Ion battery is integrated into the aluminum bottom tube, ensuring the lowest possible center of gravity, and at a class-leading 650Wh the battery will drive you further than any other electric MTB in it’s class. It’s not just me! Many of our customers have had first hand experience of the Brose motor efficiency – of course the range between re-charges on a BULLS is greater than any of its competitors because it has a higher capacity battery, but that does not explain how a BULLS with 30% more power than its rivals can run flat out for so long on one charge. Clearly, much of its range advantage is down to the efficiency of the Brose drive unit.



Integrated dot-matrix display

Excellent readability in sunlight

Adaptive display illumination


Support level

State of charge


Software update via USB

Automatic light

 Bluetooth connection to Smartphone





E-STREAM EVO 4 27,5+ transmission



The Shimano Deore XT gear set provides accurate shifting in all conditions. The Direct Mount system allows more space around the rear dropout resulting in easier rear wheel removal when required.

 Dérailleur Shimano Deore XT M8000

The new Shimano Deore XT M8000 dérailleur blend powerful performance with precise shifting.

Consistent performance in all conditions

Accurate chain position in every gear

Low-profile design keeps dérailleur safely away from trail obstacles  






Shifter: Shimano XT SL-M8000

deore rapidfire

With its advanced ergonomics the new XT shifter delivers seamless control and instant response. 

Ergonomic rotary shift lever design matches natural hand movement

Short stroke, perfect click levers provide faster, more accurate shifting




Bulls eMTB E-STREAM EVO 4 27,5+ forks


Rock Shox Revelation RC Boost Solo Air

The RockShox Revelation has evolved to tackle the most challenging trail and enduro rides. The Revelation RC DebonAir Forks feature a chassis that is descended directly from the legendary Pike forks including 35mm upper tubes for incredible stiffness in the roughest terrain. With 2.8″ tyre clearance, these forks are up to date with the latest tyre trends and the DebonAir spring ensures increased sensitivity for maximum performance.

Remote 2 position Open/Firm lever

Low-speed compression

High-speed compression

Low-speed Rebound

High-speed Rebound 



▶ Magura MT5 front, and MT4 rear

Huge braking performance and low weight doesn’t have to be expensive! The braking power of 4 pot callipers, adapted from Magura’s motor sport experience, gives you all the fine control and maximum stability you will ever need, even on the most difficult terrain, and on long descents.



This electric mountain bike has an inductive transfer Monkey Link system built-in! Monkey Link makes it possible to fit a range of accessories such as bicycle lights and mudguards with built in lights to the bike with no additional electrical connections – accessories such as front and rear lights are powered from the electric bike’s main battery via electromagnetic Inductive transfer.



Fork Rock Shox Revelation RC Boost Solo Air
Drive Train Brose S
Rear Derailleur Shimano XT
Front Derailleur himano Deore XT FD-M786DT
Shifters Shimano Deore SL-M8000
Handle BULLS
Cassette Shimano SLX CS-M7000 11-42T
Brakes Magura MT5/MT4 hydraulic
Handlebar BULLS
Seat post BULLS
Saddle BULLS
Hubs Shimano
Rims BULLS AS-35P ECCTRIC tubeless ready
Wheel size 27.5 PLUS
Tyres Schwalbe Rocket Ron SnakeSkin Addix Spgrip 70-584 (27,5 x 2.8)
Pedals Wellgo
Extras Powerpack: 37V/17,5Ah/650Wh / 3 modes: Eco, Tour, Sport / Charging time: approx. 3,4 hrs to 80%, approx. 5 hrs to 100%

Specifications correct at product launch date and may vary during production year.

bulls electric mountain bike EVO 4 27.5+ Brose

BULLS make 56 different models of electric mountain bike, each designed to meet a specific need – if you would like us to help you find the perfect BULLS for you please email or call Clare or James on 0208 960 9848 (London), Keith on 01728 830 817 (Suffolk), or Martin at our Midlands branch on 0116 3666 980 (Leicester).

All of our electric bikes are fully assembled, checked and road-tested by our expert staff prior to delivery.

High quality electric bikes last for many years so it’s important you get the one that’s right for you – but there are so many to chose from! Online research can help you narrow the options but by far the best way to ensure you’re making the right choice is to visit one of our branches, discuss you needs with one of our friendly experts, and test-ride one or all of the many brands and models we stock – there’s no substitute for spending time in the saddle!  Once you’ve made your choice you can ride your new e-bike away. Don’t worry if you can’t spare the time or are just too far from one of our shops, we’ll be happy to help you choose over the phone or via email and deliver your e-bike to your home at a time that best suits you.

▶ Personal Home Delivery

no brown box delivery1

If you choose this option our experienced staff will deliver your electric bike in person to your door fully assembled and tested at a pre-arranged time, and will work with you to ensure every thing is perfectly adjusted to suit your size and preferred riding style before that all-important test ride. We’ll spend time with you to make sure you’re happy with your choice and understand all its features, so be ready to put the kettle on!

After your test ride, when everything has been fine-tuned to your liking and you are comfortable with your e-bike we will fit any accessories you may have ordered – or those you might already have – a favourite old saddle perhaps, a particular bell, or pair of trusted hand-me-down panniers.

Only when we are certain you are completely confident in your e-bike choice and understand how everything works will we leave you to enjoy your new found freedom.

The cost of this personal service varies depending on your location and whether you would prefer evening or weekend delivery, please email or telephone us for an estimate.

Note: After you have inspected the bike, found it to be in good working order, and agreed that this is the right bike for you, the sale will be complete. If we have delivered in person please be sure you are happy with everything before we leave as we cannot accept returns once our delivery staff have driven away unless the e-bike can been shown to have a design or manufacturing fault. We then retain the right to determine the appropriate remedy, be that on-site repair or replacement of a part, a replacement electric bike, or full or partial refund. If the reason you decide not to accept the bike could have been established easily before you ordered it (e.g. you ordered a white bike and later decided you prefer black), we reserve the right to make reasonable charges for delivery and or any work done to the bike prior to delivery.

▶ Evening and weekend delivery:

Because few of us are at home during working hours these days, we offer the option of our personal home delivery service on Saturdays and Sundays, and evenings during the week.

The cost of this personal service varies depending on your location and whether you would prefer evening or weekend delivery, please email or telephone us for an estimate.

▶ Courier Delivery

Before being delivered via courier your e-bike will be fully assembled and road tested. Once we’re happy with all aspects of its performance we will carefully pack it in a sturdy box ready for shipping.  Please note that the pedals are removed and handlebar rotated inline with the frame for packing so these will need to be fitted and adjusted on arrival. This is simple to do but should you like reassurance we will happily talk you through the process over the phone, we can also arrange a phone-call with your local, trusted bike mechanic if you decide you would rather give the job to them.


Telephone: 01728 830 817 (Suffolk), 0208 960 9848 (London), 0116 3666 980 (Midlands)
Email: info@justebikes.co.uk


no brown box delivery1


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