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+- A neat lightweight direct mount retainer ring option for Hope cranksets- CNC machined 7075-T6 series aluminum provides the perfect blend of light weight and strength- Narrow wide tooth profile keeps the chain securely in place-no chain device required- Direct mount retainer ring designed specifically for Hope cranksets and available in standard or Boost offset- Weight: 62g (32t)