The Universal Derailleur Hanger standard changed the game for anyone who has ever tried to source a replacement hanger for an obscure frame — instead of hunting down a bike-specific part number, you buy the UDH and it fits any frame designed around SRAM's standard. Specialized's HGR SRAM UDH Derailleur Hanger is the genuine replacement for their frames built with UDH dropouts, which covers most of their current mountain, gravel, and road platforms designed from roughly 2022 onward. It is a replacement rear derailleur hanger from SRAM that is compatible on a wide array of bikes and works with all derailleur manufacturers.

The UDH itself is more than just a universal fit part. It protects your derailleur against chain jams by pivoting back and out of the way, slips slightly when encountering impacts, improves shifting performance, guarantees better alignment, and works with all drivetrains. That rearward rotation is the key design feature — when you slam the derailleur into a rock or the chain jams under load, the hanger rotates instead of the derailleur snapping off or ripping a chunk out of your frame. It's still a sacrificial part, but the pivot behavior gives you a much better chance of walking away with just a bent hanger rather than a destroyed derailleur.

This is also the required interface for SRAM Transmission. If you're running or planning to install a T-Type Eagle Transmission drivetrain — GX, X0, XX, or XX SL — the derailleur mounts directly to the frame through the UDH interface, so you need a UDH-compatible frame and this hanger acts as the reference point for that direct-mount system. For traditional cable-actuated or AXS derailleurs, it functions as a standard hanger.... Read More