Key Features:SRAM X-SYNC™ 1x chainrings provide the highest level of performance and durability,SRAM X-SYNC™ wide-tooth, narrow-tooth chainring technology provides maximum chain control, crucial in ‘cross,The sharp and narrow tooth profile as well as rounded chamfer edges help manage a deflected chain,Mud-clearing recesses,Designed by SRAM in Germany, X-SYNC™ rings are an integral part of the SRAM 1x drivetrain,X-SYNC™ chainrings are compatible with Quarq® brand power meters,Weight: 75g (42T).