Wheels Manufacturing Derailleur Hanger - 653 SRAM UDH use Shimano MTB Rear DerailleursWheels Manufacturing Derailleur Hanger 653 SRAM UDH for use with Shimano MTB Rear Derailleurs. Wheels Manufacturings SRAM compatible Universal Derailleur Hanger simplifies thousands of hanger designs into one universal standard. Machined completely out of aluminum this new hanger is not only strong but designed to rotate backward and slip slightly in the case of an impact preventing chain jams and protecting the drive train. All Wheels Manufacturing