Carefully selected chainline specs for SRAM Direct-mount (49mm for 28-34t, 50mm for 36t) and Race Face Cinch mount (50mm for all sizes) rings give you quiet, lasting performance. Direct-mount models available for standard and Boost chainlines. 104mm BCD, 110mm BCD, Direct-mount for SRAM, and Cinch models. NEW Oval models now shipping (1x9/10/11 only, incompatible with SRAM 1x12) Machined from durable, long-wearing 7000-series aluminum.