Trail riding can be tough on your gear. The ends of your carbon cranks can take a lot of abuse as the trail rushes underneath you and your bike. Protect your cranks from any damage with Race Face crank boots. Made from a durable Race Face proprietary plastic blend, leave no doubt and go with the originator in crank end protection. COMPATABILITY: Race Face: Next SL Cinch (G3), Sixc Cinch, Chester, Respond, Next/Next SL (24mm Spindle), Sixc (24mm Spindle) Most other popular carbon MTB cranks and assorted alloy DH cranks