Designed to fit 94 BCD 4-Bolt cranks such as the SRAM X1 crank, these rings will provide maximal chain retention and minimal noise. These rings feature the patent pending Drop-Stop asymmetrical tooth design for the best in wear life, mud clearance, and chain retention.Optimized for use with 10, 11, and 12 speed chainsNot compatible with 9 speed chainsMade from 7075 Aluminum for long lifeFeatures Wolf Tooths Drop-Stop tooth design for maximum chain retention49mm chainlineItem SpecificationsColorBlackMaterialAluminumChainring BCD94Defined ColorBlackRing Position/TYPEChain Retaining Single RingDrivetrain Speeds10Drivetrain Speeds11Drivetrain Speeds12Tooth Count30