Our newest OM (“One Mount”) system features a redesigned mount that accepts an exceptionally wide range of shift levers. For example, you can now use the current MicroSHIFT bar-end levers that originally came on your bike as integrated shifters. OM systems are compatible* with: All current Gevenalle shift levers Current MicroSHIFT levers Shimano 6, 7, 8, 9, 10, and 11-speed downtube and bar-end levers Most vintage levers designed for standard downtube mounts *NOTE: Mounting bolts for Microshift and Shimano levers will need to be shortened slightly. For Microshift we offer a ready shortened bolt here The OM system with included shift levers is available in two versions: Dia-Compe MTB Friction — designed for newer Shimano and SRAM MTB derailleurs that require greater cable pull Dia-Compe Road Friction — the same levers we spec on the Audax, compatible with most traditional drivetrain setups Ride what you want, not what the industry dictates. 100% Satisfaction Guarantee Ride them for 30 days and if they're not right for you, return them for a full refund — no hassle, any reason, any condition.