Wolf Tooth Elliptical 107 BCD Chainring - 42t, Compatible with SRAM 107 BCD, Drop-Stop B, 4-Bolt, BlackThe Wolf Tooth Elliptical 107 BCD Chainring for SRAM cranks is compatible with most new SRAM 1x road cranks that use the 107 BCD spider, including the SRAM AXS Power Meter Spider. This chainring uses the patented Wolf Tooth Drop Stop B Wide Narrow tooth profile that is optimized for drop bar bikes and designed best wear life, mud clearance and chain retention. Product Details: Compatible with all 10 , 11 , and 12 speed chains, with the exception of