Check the listing for details. Wolf Tooth Blue Universal Derailleur Hanger for UDH Frames | CNC Aluminum, MTB. Color: Blue, Condition: New. Listed at 49.60 USD. 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, , 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. Full CNC aluminum construction Designed to rotate back in the event of a.