Shimano RT76 XT Ice Tech Disc Brake Rotor Crammed with the latest technology from Shimano these rotors provide unmatched performance & control. Using a special steel & aluminium construction the Shimano RT76 XT Ice Tech Disc Brake Rotor can dissipate heat to improve pad life & reduce fade on lock descents. Features SMRT76 rotors give excellent performance using the 6-bolt mounting system Precision cut stainless steel braking surface improves pad clearing in muddy conditions while aiding cooling under high load Rotor contact surface has been developed for excellent pad clearing & cooling which increases pad performance & life Large forged alloy spider supports rotor surface- increasing rigidity & reducing weight Comes complete with mounting hardware Average weight for 160 mm rotor is 138 grams