Aluminium Alloy Bike Chain Guard Stabilizer Rear Derailleur Chains Tensioner A
- Eay to install, installed in the frame claw screw hole.
- Adjusting to achieve perfect chain tension.
- Used for single speed bike to solve the problem of chain tension.
- Made of high quality aluminium alloy material, sturdy, durable and long service life.
- Small size and light weight.