SRAM Red X-Glide Road Chain RingPerfect for road bike use, this chainring is a genuine replacement part from SRAM. It features a rock-solid 7075-T6 aluminium construction, which makes it great at handling all the abuse that's associated with long days on the road. Compatible with SRAM Red 22 drivetrains, this is superb replacement for breathing new life back into your road bike setup. Features:Material: 7075-T6 AluminiumUse: RoadSpeed: 11 speedBCD: 52T: 110; 53T: 130Drivetrain Compatibility: SRAM Red 22YAW CompatibleHidden Bolt SystemPart Numbers: 53T: CRS032000; 52T: CRS031000 and 50T: CRS031010Buy SRAM Components from Chain Reaction Cycles, the World's Largest Online Bike Store.