Designed to simplify thousands of derailleur hangers into one universal design the Wolf Tooth Universal Derailleur Hanger - UDH connects your derailleur to your frame. It's compatible with all frames designed around the SRAM UDH and is compatible in mounting all standard (non-Full Mount) derailleurs from SRAM Shimano Campagnolo TRP etc. The benefits of a UDH include increased shifting precision and stronger construction than standard derailleur hangers. The Wolf Tooth Universal Derailleur Hanger - UDH is an aftermarket component designed to replace the stock UDH that is included with your frame.Compatible with bike frames designed to accept the SRAM Universal Derailleur Hanger - UDHCompatible with all road gravel MTB and EMTB drivetrains (except SRAM Full Mount Transmission which does not use a hanger)Meets requirements for Shimano XTR Di2 M9200 due to the all metal constructionFor Axle Thread Pitch M12x1.0 (Rear axle not included)NOT compatible with ABP equipped Trek bike models