Praxis Replacement Bolt / Extractor

The Praxis M30 or M24 Main Bolt & Self-Extractor kits keep your crank arms spinning smoothly for the long haul. These all-in-one solution combine a durable chromoly steel main bolt with an integrated self-extractor. Simply use an 8mm hex wrench to install the bolt and securely fasten your M30 or M24 crank arm. When service is needed, the self-extractor design allows easy crank arm removal using a cassette tool.