The Bontrager 2013 XR4 26” Clincher Tyre is your tire for rough trails, wet or dry. The aggressive tread design with deep, lateral cupped blocks, long shoulder blocks and buttressed tread block edges is ideal for loose and rocky conditions. Designed to out-corner any other tire on the market. Engineered for XC and Trail riders in loose and rocky conditions. Covered by their Unconditional Bontrager Guarantee.