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 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. The narrow-wide chainring is designed to retain the chain without the need of a chain device. Direct mount retainer ring designed specifically for Hope cranksets and available in standard or Boost offset. Weight: 62g (32t)Item Specifications: Oval/Round, Round, Teeth, 32, Color, Silver, Model Name, R22 Spiderless Retainer Ring, Ring Type, Single (Anti-Chain Drop), Mount, Hope DM 3mm Offset,.