Feedback Thru-Axle Chain Keeper Keep Your Chain Secure The Feedback Thru-Axle Chain Keeper is an ideal solution for keeping your bike chain secure during bike washing, tune-ups, and traveling. This elegant, lightweight, bio-based plastic design fits perfectly on the axles of 12mm thru-axle dropout systems, no tools required. By keeping chain tension with the Thru-Axle Chain Keeper, you can be confident your bike is safe during drivetrain cleaning or travel. Features Prevents the chain from slapping against your frame High-density, solvent-resistant, Bio-based PA56 roller is easy on your chain, yet incredibly durable Keeps the chain tensioned and fits 12mm thru-axle dropouts | Feedback Sports | Thru-Axle Chain Keeper Black