If your frame's rear dropout accepts the SRAM Universal Derailleur Hanger, the 00.7918.093.000 is the OEM replacement part — the same hanger that shipped with the bike from the factory. UDH-equipped frames have become the industry default across road, gravel, and mountain because the interface consolidates what used to be thousands of frame-specific hanger shapes into one standardized part you can find anywhere. SRAM UDH is designed to unify derailleur hanger standards, and consolidating different hanger designs makes replacing a bent hanger easier and helps optimise shifting because there are fewer variables.

Beyond just being a standardized shape, the UDH is engineered to protect the derailleur when things go wrong. The UDH is designed to rotate rearward in the event of impact and features the ability to "re-rail" the chain back onto the small cog. Instead of the derailleur taking the full force of a strike or a chain jam, the hanger pivots back and slips slightly, which is often the difference between a hanger replacement and a snapped derailleur cage. Once the impact is over, the hanger returns to its indexed position and the drivetrain keeps working.

Compatibility is the reason to buy the SRAM part specifically. If your bike came with a UDH from the factory, this is the direct OEM replacement. The UDH works with all commercially available MTB and E-MTB drivetrains from Shimano to Box to Sunrace , along with SRAM road and gravel groupsets that mount to a traditional hanger. It is not the part you need if you are running SRAM Transmission or a Full Mount derailleur — a UDH-compatible bike uses a standardized interface that allows you to mount either a traditional derailleur with a UDH hanger, or a Full Mount derailleur that replaces the UDH hanger by mounting directly to the frame. For Transmission and Full Mount setups, the hanger comes off and the derailleur bolts directly to the dropout.... Read More