The Universal Derailleur Hanger consolidates thousands of
 hanger options across the industry. It protects your derailleur against
 chain jams by pivoting back and out of the way, and slips slightly when
 encountering impacts. It improves shifting performance, guarantees 
better alignment, and works with all drivetrains. Plus, if you ever need
 replacement, it will be available everywhere. The UDH. One hard-working
 hanger.
FEATURES
- The Universal Derailleur Hanger – or UDH – consolidates thousands of mountain bike derailleur standards.
- It offers unparalleled derailleur protection. And perfect alignment. Guaranteed.
- 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.
- The UDH works with all commercially available MTB and E-MTB drivetrains from Shimano to Box to Sunrace.