RACE FACE CINCH 12-SPEED SHIMANO CHAINRINGONLY FOR HYPERGLIDE+ CHAINSWhether you're upgrading to a 12-speed Shimano drivetrain or you're replacing a worn-out chainring, you'll want to consider the Race Face Cinch 12-Speed Shimano Chainring. It is a narrow-wide chainring that is compatible with Race Face Cinch system cranks. With a direct-mount system, you can easily switch between rings and spiders to adapt to the terrain you'll be riding on. It's only compatible with Hyperglide + chains and is designed for use with 12-speed Shimano drivetrains. Features Narrow-wide tooth profile ensures consistent chain retention Only compatible with Shimano Hyperglide+ chains Direct mounting allows an easy switch between rings and spiders SPECIFICATIONSDrive Train Speed12-Speed Tooth Count30, 32, 34Material Aluminum Direct Mount Type Race Face Cinch Chainline Boost, Non-Boost Offset3mm Intended Use Mountain Weight-Chainline/Chainring Offset Guidelines Rear Spacing135mm / 142mm148mm Boost Super Boost 150mm / 157mm Fat Bike (170mm, 190mm, 200mm)Chainline48 - 50mm51 - 53mm54 - 56mm56mm+Chainring Offset~6mm~3mm~0mm~+2mm | Race Face | Cinch 12 Speed Shimano Chainring | Black | 34 Tooth | Aluminum