No more jarring rides
The central motor offers a smooth and fluid pedaling experience for the trail ahead.
| level of practice | advanced |
| intensity | mid intensity |
| power assisted | with electric assistance |
| number of speeds | 10 speeds |
| bike frame material | aluminium frame |
| motor position | middle position |
| number of chainrings | single chainring |
| maximum load | 100 kg |
| lighting types | battery lighting |
| connected | not connected |
| wheel size | 27.5+" |
| built-in battery | without built-in battery |
| condition | new |
| type of brakes | hydraulic disc brakes |
| type of practice | leisure mtb |
| battery capacity (in Wh) | 500 to 599 Wh |
| type of bicycle fork | suspended fork |
| weight (in kg) | 22 kg |
| removable battery | removable battery |
| charger type | sector |
| handlebar diameter | 31.8 mm |
| number of bottle-cage holders | 1 |
| seatpost compatibility | telescopic seatpost not compatible |
| trunk bag fixation | trunk bag fixation |
| tubeless compatibility (tyre) | non tubeless compatible |
| tubeless compatibility (wheel) | tubeless compatible |
| type of seatpost | rigid |
| cassette | 11/42 |
| crankset | 34 |
| crank length (in mm) | 175 mm |
| seatpost diameter | 31.6 mm |
| engine torque maximum | 70 Nm |
| front suspension travel | 120 mm |
| bell | with bell |
| handlebar width | 720 mm |
| rear suspension travel | not concerned |
| suspension | semi stiff |
| autonomy (in km) | up to 70 km |
Bike frame: 100.0% Aluminium |
Don't forget to remove the battery to handle the chain.
Store it in a warm, dry place away from corrosive products and salty air. Never store with the battery flat, and remember to recharge it at least once every six months.
ROCKRIDER products are tested throughout the design and development process before we take them on real terrain through real conditions.
Testing in the field
To make sure every ROCKRIDER product excels in its environment, after our designers and engineers are happy, we give them to a team of riders to put them to the test along real-life trails through wet, gravel, mud and grass. Our riders pay special attention to quality, traction and handling, and we make our final adjustments based on their feedback.
Manage electrical assistance
A screen located on the handlebars allows you to manage your assistance mode:
Mode 0 - Inactive
Mode 1 - Economy +40%
Mode 2 - Economy +80%
Mode 3 - Standard +160%
Mode 4 - Boost +320%
This display also provides information on your assistance level, battery status, speed, remaining battery life, and more.
Removing the battery
A lever allows you to quickly and easily position or remove your battery. The battery is snugly held in place during your MTB rides thanks to this system. You can also lock the battery with a key to prevent theft.
Care advice
Leave your battery on the bike when washing using a hose to protect the connectors from rusting. Store your bike in a warm, dry place away from corrosive products and salty air. Never store with the battery flat, and remember to recharge it at least once every six months.
Spare parts
Even with regular maintenance, it's common for some components to wear over time. Most bike repairs are relatively easy, so it's useful to have a few key tools so you can get back riding again quickly. Some tools are specific to bike parts and others are more common (Allen keys). Need to change some components? Take a look at our spare parts for the E-ST 900. However, if you do not want to tackle a repair yourself, your local Decathlon workshop will be happy to help.
No more jarring rides
The central motor offers a smooth and fluid pedaling experience for the trail ahead.
Unleash 70Nm torque power
Head for the summit powered by a 250W motor with 70Nm torque
No more jarring rides
The central motor offers a smooth and fluid pedaling experience for the trail ahead.