Race Face Crank Boot Description: Race Face Crank boots slip onto the end of your crank arms to protect them from rocks and other trail debris while riding. Features: Protective plastic crank arm caps prevent damage to the tips of crank arms Smaller size when compared to the standard Race Face crank boots Compatibility: Race Face: Turbine, Atlas, Evolve, & Ride Cranks SRAM: X1 (Alloy), X9, X7, X5, S1400, S1000, S800 Cranks Shimano: XT, SLX, Deore Cranks