Description Engineered to be quiet and smooth Legendary Wolf Tooth chain retention. Prevents premature ring and chain wear that can come from non-optimized profiles. Weight: 30T 63g | 32T 66g | 34T 72g Material: 7075-T6 aluminum Made in the USA Compatibility: Super Boost Plus Shimano XTR M9100, XT M8100, and SLX M7100 series 12 speed cranksets. Compatible with Shimano 12-speed Hyperglide chains
