The Union GH-021 frame hanger

The Union GH-021 derailleur hanger is an essential and replaceable part of a bicycle frame responsible for ensuring the safety and precise operation of the rear derailleur. This specific hanger, identified by reference number UNI-34035, is compatible with bicycles from brands such as Bianchi, Colnago, Giant, Kona, and others. Its replacement can be crucial in the event of damage or wear to the derailleur hanger, enabling smooth operation of the rear derailleur and ensuring proper functioning of the bike's drivetrain.