1PC Folding Bike Single Speed Chain Guide Clamp Adjustable Anti-Drop Protector Stabilizer Bicycle Parts Chain Guard

Chain GuideMaterial: Nylon Application: For 39-42mm frame tube installation Net Weight: 13.9g tips: This is not suitable for multi-speed systems, only for single-speed chainring use.When you shift from the big-to-small chainring, the chain guide can effectively prevent the chain from falling when shifting. Whether you are riding hard or riding slowly, this component will provide reliable protection for your shifting process.