Cycling compatibility
Two parts can share a voltage, cog count, torque figure or familiar shape and still not work together. Start with the parts you can identify, then check the manufacturer and bike-OEM relationships that actually decide fit and function.
Free e-bike motor compatibility checker
Brand-neutral replacement and upgrade checks across major supported systems including Bosch, Shimano, TQ, Specialized, Giant, FAZUA, Pinion, Avinox and Bafang, with bike/OEM conditions kept explicit.
Free e-bike battery compatibility checker
Brand-neutral compatibility across major e-bike systems. Check documented replacement, charger, capacity-upgrade and range-extender paths without assuming voltage or connector shape proves compatibility.
Bike cassette & drivetrain compatibility
Check cassette/freehub fit, derailleur range and indexing using named component families rather than assuming same-speed or same-brand parts will work together.
Which checker should I use?
- Motor / drive unit: use the free e-bike motor compatibility checker. It is brand-neutral across the supported motor systems, and broad names such as EP8 or Bosch Performance Line CX are narrowed to exact DU/BDU identity before a replacement path is claimed.
- Battery, charger or mount: use the free e-bike battery compatibility checker. It covers major supported systems without favouring a retailer or battery brand, and requires enough identity to support the result instead of relying on voltage alone.
- Cassette, freehub, derailleur or shifter: use the drivetrain checker. It handles HG, Micro Spline, XD/XDR and named generation exceptions rather than treating cog count as proof.
These tools help narrow a compatibility question. They do not replace mechanical inspection, installation instructions or manufacturer safety requirements.