Key considerations
- BBS02 and BBSHD versions are different — order the one that matches your motor
- Narrow-wide teeth need a chain in good condition to shift cleanly
- Smaller tooth counts reduce top speed slightly
- Check chainstay clearance on fat bikes and small frames
Pros
- Better chainline, less chain drop
- Durable machined aluminum
- Several tooth counts
Considerations
- Premium price
- Motor-specific versions
- Minor gearing change
Features & specifications
| Tooth count | 42T |
|---|
Specifications are manufacturer-published figures or our own notes; confirm on the current listing before purchase.
Compatibility notes
- Bafang BBS02/BBS02B (BBS02 version) or BBSHD (BBSHD version) only — not for hub-motor bikes



