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. Wrap it up and protect the tips! These Fit: Race Face:Next/Next SL, Next Sl Cinch, Sixc, Sixc Cinch, Respond Sram: XX, XO, Noir FSA: Gravity, Gravity Lite Shimano: Saint, Dura Ace 9000 Race Face refers to the Standard Size Crank Ends as Carbon Crank Boots (as they fit MOST Carbon Cranks). PLUS, we’ll send you samples of Crankskins bicycle protection products! Is your crank wrapped?????