Product Features:
1. Mounted on the shaft bolt of your bike rear axle.
2. Approximately 63mm in length and 23mm in diameter, suitable for bikes with a 10.5mm rear axle.
3. Hexagon design, with a certain plane to give better support to your feet, loading approx. 50kg for each.
4. Also can be used as a rear derailleur protector, protect the transmission system from scratches.
5. The length bike rear axle shaft screws is better at least 6mm, the longer the shaft length is, the safer the installation and use.
6. Quick release type rear hubs are not applicable.