Because you love your bikes, when you’re not riding them you’re washing them, tuning them, or traveling to exquisite ride destinations. The 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. Protects rear derailleur by maintaining chain tension when the rear wheel is removed. Ideal bike service tool for washing, tune-ups and traveling. Accommodates road bikes, cyclocross bikes, mountain bikes, electric bikes, fitness bikes and more. Fits 12mm Thru-Axle dropouts. Prevents the chain from slapping against delicate and painted frame surfaces. High-density, solvent resistant, Bio-based plastic PA56 roller is easy on your chain, yet incredibly durable. Tool-free, easy-install design makes use simple and effective for beginner or professional bike mechanic. SAG Sustainability Action Group approved – bio-based material, low packaging volume, and mono-material for easy recycling.