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Motors & drivetrain for your fatbike
Rear-wheel motors, chains, sprockets and derailleur parts for your fatbike. Voltage, power and fitting size are critical — check them against the specifications before you order.
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11 partsMotors & drivetrain
On backorder
On backorder
Only a few left
Replacing a motor or drivetrain
You replace a hub motor like-for-like: the voltage (36V/48V), the power (250W for public roads) and the fitting width of the rear frame must match your current motor. We only supply legal replacement motors — no tuning kits. Chains and sprockets also differ per model; check the number of links and the pitch before you order.
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Shop by fatbike model
Go straight to the parts that fit your fatbike.
OUXI parts 101OUXI V8 parts 101OUXI H9 parts 84OUXI V20 parts 737GO parts 44QMWheel parts 38Diablo parts 387GO EB2 parts 65Knaap parts 39ENGWE parts 37ENGWE M20 parts 61AGM parts 39Knaap AMS parts 60Knaap AMSX parts 607GO EB3 parts 587GO EB4 parts 587GO EB8 parts 58Knaap RTD parts 57ENGWE E26 parts 57Phatfour parts 37
Buy a fatbike motor and drivetrain
The motor and drivetrain provide your pedal assist. Most fatbikes have a 250W rear hub motor — the legal maximum in the EU for a pedal-assisted bicycle up to 25 km/h. Besides the motor itself, this also covers sprockets, chains and drivetrain parts. These parts are model-specific and must match your rim, voltage and model year. Check the specifications or ask us if in doubt.
Which motor fits my fatbike?
Among other things, we stock a 250W rear-wheel motor 20×4.0 for the Diablo and drivetrain parts for various 36V fatbikes. A hub motor must match your rim size (usually 20 inch), your voltage and your connector. Read the power and voltage off your current motor, or ask us — we will find the right motor and plug.
Motor, chain and sprockets together
If you hear a ticking or slipping sound while pedalling, the problem is often not the motor but the drivetrain: a worn chain, sprocket or crank. For that, see our pedals & cranks. Replace worn parts together, so a new chain doesn't immediately wear on old sprockets.
Power and legislation
Stick to 250W and 25 km/h to stay legal and insured on public roads. A heavier motor or tuned software quickly turns your fatbike into a moped, with registration and insurance obligations as a result. If your motor works together with your display and controller, match them when replacing. In doubt about the fit? Check the specifications or ask us.