This is the SRAM Force 1 X-Sync Chainring. For 1 x 11 or 1x10 drivetrains, SRAM offers a variety of gearing options to optimize your setup. Cassette selection combined with 1x specific front chainrings in 52 and 54 tooth sizes give you a range of gearing options. Features: SRAM X-SYNC 1X chainrings provide the highest level of 1x performance and durability SRAM X-SYNC wide-tooth, narrow-tooth chainring technology provides maximum chain control The sharp and narrow tooth profile as well as rounded chamfer edges help manage a deflected chain Mud-clearing recesses for the inner chain links and rollers CX1 X-SYNC chainrings are compatible with Quarq brand power meters Specifications: Chainring Shape: Round Drive Type: 1x Speed Compatibility: 10 and 11 Speed Chainring BCD: 130mm Mount: 5-Bolt Material: Aluminum Color: Grey Weight: 141g (52T)