Shimano RT86 Disc Brake Rotor (Icetech) 203m (Pair)The 3 layer sandwich construction of the RT86 rotor was designed to dissipate heat more efficiently than traditional single material rotor which translates into more fade resistant performance, especially on long descents or in hard braking applications. 6 bolt mounting style with hardware included Prolonged brake pad life due to better heat control Large forged alloy spider increases rigidity and reduces weight Recommended for XT, XTR, Zee M640, and