For 29 inches Wheel. DeFender M1 is compatible with all standard front forks including reverse arch designs, the unique quick release attachment system integrates the DeFender M1 seamlessly with the front of your bike. The XC11 is a lightweight removable rear fender providing exceptional mud/spray protection. Multiple pivots allow easy fender angle adjustment for a perfect fit while the quick release clamp adjusts to fit 25.4, 34.9mm seatposts. Advanced high impact plastic is co-molded to a flexible trailing edge for resistance to impacts. Both fenders feature a highly polished underside to prevent mud buildup and aids in cleaning.