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San Francisco, CA 94103
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Phone: (415) 934-8000
Open: Mon - Sat 11-7
Sun 11-6
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Bulls E-STREAM EVO AM 4 27.5+

Bulls E-STREAM EVO AM 4 27.5+
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With the consistent merging of the latest drive technology and an exclusive setting design, the E-STREAM series creates an eBike experience with a maximum sporting factor. The most powerful battery, fully-integrated in the downtube, is on the market with the Brose BULLS co-designed engine for a new development stage in the EVOlution of eBikes. The E-STREAM EVO models are classic bikes with a little extra push, whether you’re pedaling on or off-road, they open up new perspectives.

The latest 50-cell battery technology gives the removable battery an impressive capacity of 650 watt-hours in the blink of an eye. Combined with the equally powerful and energy-efficient Brose Drive S (250W), the E-STREAM EVO series works to true condition miracles. Thanks to 100 Nm of torque you’ll never be lacking the power to get the necessary “punch.” The belt driven motor pedals with ultimate smoothness and thanks to the high-resolution sensors, it’s always assisting efficiently.
The combination of strength and stamina to create a perfect center of gravity while still maintaining an optimal ground clearance wasn’t easy. Much engineering and testing went into the creation of our E-STREAM EVO series. Integration was key for simplicity and our CSI display is the perfect example for that. The combined capability of control and information is easily managed in our Compact Sports Interface display. The CSI display is conveniently located on your handlebars where it provides necessary information and controls. The unit isn’t bulky so during a fall or crash it isn’t prone to breaking.

With so much attention to detail, other features such as the new Boost hub standard for increased wheel rigidity, Rock Shox Lyrk RC Boost Solo Air, 150mm and a Rock Shox Deluxe RT, 150mm. Shimano Deore XT and extra-wide tires for increased traction all make the BULLS E-STREAM EVO AM 4 27.5+ a solid choice. Unlike most eBikes on the market, our integrated battery allows space to accommodate a water bottle cage for hydration.

In addition to a sophisticated interplay of technology and design the E-STREAM EVO series has a stellar range of models. The models range from all-mountain, full-suspension bikes for technical trails or marathon use to hybrids and even fat bikes. The redesigned frame on our Plus models allows for more tire clearance allowing you to use plus size tires for maximum traction. Wider tires also absorb more bumps on the road essentially giving you a more comfortable ride.

Not to mention that E-STREAM EVO AM 4 is MonkeyLink compatible, you can simply add accessories such as rear light, front light, water bottle, and mudguard in just one-click.


Frame 7005 Aluminium
Fork Rock Shox Lyrk RC Boost Solo Air, 150mm
Drive System Brose Drive S (250W)
Battery Type/Weight 37V/17.5Ah/650Wh
Charger Type 37V/17.5Ah/650Wh
Recharge Time approx. 3.4hrs to 80%, approx. 4.5hrs to 100%
Range on Full Charge 137 miles (single charge at the optimal condition)
Max. Assisted Speed 20mph
Saddle Selle Royal Seta M1/ BULLS
Handlebars BULLS
Bicycle Drivetrain Brose Drive S (250W)
Wheels 27.5+ BULLS
Tires Schwalbe Magic Mary Snakeskin/Nobby Nic, TLE, Apex, Folding 70-584, 27.5×2.80
Brakes Magura MT-5/ MT-5, hydraulic disc brakes, 203mm/ 203mm
Pedals Wellgo
Weight 54.01 lbs (approx.)
Sizes 44,49,54cm

* Subject to change without notice.

Part Numbers

Option MPN Store SKU
44 791-50544 791-50544
49 791-50549 791-50549
54 791-50554 791-50554