- Narrow-wide teeth prevent chain drop, updated tooth profile runs quieter - Durable 4mm thick 7075-T6 aluminum with reversible laser etched graphics - Compatible with 9-11 speed chains, allowing a 1X set up on most any drivetrain (works with SRAM 12sp, but not Shimano 12sp chains) - 30T rings are threaded for standard M8x0.75 chainring bolts
