Compatible Components: [Race Face] Next, Next SL, SIXC, Respond, [SRAM] XX, X0, Noir, [FSA] Gravity, Gravity Lite, [Shimano] Saint Manufacturer Warranty: 2 years The Race Face Crank Boots offer an attractive and affordable solution to protecting your favorite cranks from the inevitable bashing and smashing incurred by riding through rough terrain and rock gardens. Crank Boots are especially useful with low-slung trail rigs, as the lower bottom bracket leaves less pedal and crank clearance over rough, boulder-strewn trails. They're also essential to protecting your pricey carbon cranks from unsightly scuffs and scratches.