Park Tool CM-5.3 Cyclone Chain Scrubber components and ensures precise gear changes

and ensures precise gear changes under load

helping riders maintain an aero position while adding power and improving overall stability

more convenient bleeding nipple position

76 / 176 DB hubs with center locking interface

the KNUCKLEDUSTER also features a tapered internal sleeve that you have to tap onto your handlebar for full engagement

Park Tool CM-5.3 Cyclone Chain Scrubber components and ensures precise gear changesClean bicycle chains quickly, easily, and effectively without the hassle and mess of removing the chain from the bike. The CM 5. 3 uses an extra large solvent reservoir and a series of four rotating brushes to get chains sparkling clean inside and out. A magnet at the bottom of the CM 5. 3's solvent reservoir draws away particles scrubbed from the chain, effectively keeping them from being redistributed on the chain during cleaning. The durable sponge