Bringing you simple efficiency, the single ring design of this MTB chainset combines with your 1x 11-speed gearing for smooth performance & excellent chain retention, but without the extra weight. Please Note: This chainset is primarily designed for use in mountain bike frames that have the BB392EVO (91.5mm wide shell with a 46mm inner width), however adapting bottom brackets (sold separately) can be purchased to make it compatible with other bottom bracket shell standards.