The new R22 chainrings are specifically designed to be compatible with all new drivetrain systems on the market.The R22 features a new tooth profile to work with all major drivetrain types along with updated spider designs and compatibility with 9/10/11 and 12-speed drivetrains, including SRAM T-Type and Shimano HG+.Features:- Asymmetrical tooth profile designed for cross-compatibility and functionality with different drivetrain systems- Compatible with 9/10/11 and 12-speed (including SRAM T-Type and Shimano HG+)- Improved mud shedding capability- Enhanced chain retention- Better performance with extreme chain angles on modern 1x drivetrains- Tooth profile allows for greater chain wear before chainring function is compromised, prolonging lifespan- Spiderless chainrings have a new leg design with increased strength and stiffness- Machined from 7075-T6 aluminum- Hope direct mount STD offset (49mm chainline)Specifications:- Size range from 28T to 36T- 4mm 104 BCD bolt