Wheels Mfg. gives UDH bikes a direct-mount hanger for Shimano derailleurs - Bikerumor
Silca Titanium Derailleur Hanger | The Pro's Closet | CDE10045
Derailleur Hanger 105 - Bicycle Parts Direct
Shimano 105 rear derailleur failed with a bang in 3 places at same time. Would fitting a new R7000 rear mech work with my 5800 shifters? : r/bikewrench