Some links here are affiliate links. If you buy through them we may earn a small commission at no extra cost to you. As an Amazon Associate we earn from qualifying purchases.
The e-bike kit part people skip, and why it matters
By Lewis Whitter, wedding & events photographer (11+ years) · How we pickThe one part of an e-bike conversion kit people skip is the torque arm. And it matters.
A hub motor pushes hard against the fork or frame, and if the axle can spin in its slot, the wheel can come loose. That is a real safety risk, most of all with a front hub on a steel or aluminium fork.
A torque arm is a small metal bracket that locks the axle to the frame, so the motor cannot twist free. Check the fit, tighten the axle nuts to the maker's torque, and check them again after your first few rides.
If your kit did not include one, buy one before you ride. It costs little compared with a crash.
The picks
Read next
The Only 3 Home Gym Buys Worth ItThree home gym buys that actually get used. One. Adjustable dumbbells. Two. A squat rack with…Read the guide →UK-legal e-bike conversion kits explained: the rules, the kit types and staying safeUK-legal e-bike conversion kits explained: the 250W, 15.5mph and no-throttle rules, front hub…Read the guide →
E-Bike Conversion Kit vs New E-BikeDon't buy an e-bike yet. You might already own half of one.Read the guide →