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. Bolts and washers are available in nine Color Shop hues to match other Wolf Tooth anodized components and accessories. Compatibility Info - Rear axle not included - Full CNC aluminum construction - Designed to rotate back in the event of a crash to help prevent damage to the derailleur or frame - Compatible with bike frames designed to accept the SRAM Universal Derailleur Hanger - UDH - Compatible 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 construction. - For Axle Thread Pitch M12x1.0 - NOT compatible with ABP equipped Trek bike models