Shimano's SM-RT64 Centerlock Rotor comes from their trusted Deore series, which prepares riders to take on everything from cross country riding to shredding your favorite singletrack. The SM-RT64 delivers braking performance for rides when the sun is shining, but also when a few surprise showers show up. We like that Shimano's Center Lock mounting system making everything easy to install and replace so maintenance is quick and we can get riding sooner.