2020 Rockrider


A 27.5″ aluminum frame hardtail trail e-bike with modest components.
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MSRP£1,699 (about $2,151)
Weight48.3 lbs  
SuspensionHardtail, 120mm
ForkRockShox Judy
MotorBrose 70Nm mid-drive
BrakesHydraulic Disc
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Ride over obstacles (roots, pebbles, stones, etc.) easily thanks to the Rockshox JUDY fork with 120 mm of travel. This fork has:, - a thru axle and tapered steerer tube for more durability. - pneumatic spring for optimal adjustment based on your weight, - rebound adjustment and lockout for better control, depending on the terrain.


Spring TypeCoil


Since your mountain bike rides will get longer and longer, it is important to sit comfortably. So our teams designed the exclusive ROCKRIDER Ergofit Pro saddle. It fits all hip sizes and has a curved shape that is particularly good for sport trail rides. The 31.6 mm aluminium seat tube ensures compatibility with most dropper and suspension seat posts on the market.


The E-ST900 electric bike is equipped with a single chainring and ChainFlow 3D anti-drop technology to prevent chain drops. A single shifter on the right handlebar makes it easy to shift between the 10 speeds. In detail:, - ChainFlow anti-derailment 34-tooth chainring, - SHIMANO DEORE M6000 Shadow+ 10-speed rear derailleur with long cage, - SHIMANO DEORE M6000 right shifter, - SHIMANO DEORE 10-cog cassette (11-42 teeth), - KMC E10 Turbo special e-bike chain


No matter the conditions you ride in (dry, muddy, wet), the Tektro TKD32 hydraulic disc brakes on the front and rear provide powerful, progressive braking. Oversized 180mm diameter discs provide even more power.

TypeHydraulic Disc


So you feel safe on any terrain, and to provide traction suited to your motor, the E-ST900 mountain bike is equipped with Hutchinson Taipan Koloss 27.5+ tyres with a 2.8" cross-section. Our test riders particularly liked these tyres for their good grip. Mounted on wide rims, these tyres ensure grip, traction and comfort on any terrain.

Electric Components

The BROSE T Aluminium central motor is specially designed for high altitude mountain biking:, - 70 Nm torque to handle large obstacles and steep gradients, - metal housing for maximum durability, - belt for an ultra-quiet motor, - sealed bearings to hold up to tough environments while mountain biking


Our Rockrider mountain bike team has designed a battery that locks in place with a simple lever. Child's play! This locking system stops the battery getting shaken when you go adventuring on rough terrain. A key lock is also installed if you want to protect your battery from theft. For example, if you park your bike in the street.

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Last updated July 14
Not listed for 1,327 days