Topic
Conversion kits
Front hub, rear hub and mid-drive kits that turn a bike you own into a pedal-assist e-bike. Fit and the 250 W limit come first.
- Road-legal kit
- 250 W, 15.5 mph cut-off
Many kits are sold in 500 W to 1,000 W versions. On UK roads only a kit set to 250 W continuous with assistance cut at 15.5 mph keeps the bike an EAPC.
Check the dropout width, wheel size, brake type and bottom bracket before you order. A front hub kit is the simplest to fit; a mid-drive needs the right bottom bracket tools.
Common mistakes
- Fitting a hub motor to a front fork with carbon or thin aluminium dropouts.
Guides on this topic
- Swytch vs Bafang conversion kitsSwytch front hub kits with a handlebar battery against Bafang mid-drives: fitting, hills, weight, UK 250 W versions and which bike and rider each suits.Comparison
- Hub motor vs mid-drive e-bikesHub motors and mid-drives compared: where each sits, how they feel on hills, what wears faster, which is easier to repair and which suits conversion kits.Comparison
- How to fit an e-bike conversion kitHow to fit an e-bike conversion kit: tools, dropout and rim checks, the motor wheel or mid-drive, sensors, brake cut-offs and tidy cable routing.How-to
- Conversion kit vs buying a new e-bikeE-bike conversion kits and new e-bikes compared on weight, brakes, frame suitability, fitting, warranty and resale, so you can tell when converting is worth it.Comparison
- Can you make a normal bike electric?Yes, many bikes can be made electric with a conversion kit. Here is which frames, forks, brakes and wheels suit a kit, and which bikes to leave alone.Guide