The Shimano Deore XT RT-MT800 centerlock disc brake rotor features an advanced heat sync design. Rotor construction uses Shimano FREEZA technology to boost heat dissipation and reduce fade Easy disc brake rotor installation with spline mount and lock ring Compatible with metal and resin brake pads Rotor Size (mm): 160 Hub/Disc Compatibility: Center-Lock Disc Pad Compatibility: All Pad Compounds We know that disc brakes are all that and a bag of chips thanks to their reliable all-weather braking performance, and the RT-MT800 Centerlock Disc Rotor features new technology to amp that performance up a notch. Shimano's Freeza technology means this rotor is able to cope with sustained braking and higher temperatures associated with road cycling. That advanced heat sync design reduces brake fade, and installing and removing the rotors is quick and easy thanks to Shimano's centerlock design.