UDH is the big bike buzzword these days – with SRAM’s latest direct-mount Transmission derailleurs requiring it – but Sour thinks they’ve found a better way to future-proof their steel bikes. Instead ...

Derailleur Hanger 65 for Stumpjumper Hardrock Hotrock S works on sale, Specialized Sandwich Hanger on sale, Sram Universal Derailleur Hanger Bike Society on sale, Specialized MTB Through Axle ...

OK I know, I know… We finally got a universal derailleur hanger standard that brands were whole-heartily adopting, and these steel bike builders decided to screw with it and make another standard!

2024 Sour Not-UDH almost universal derailleur hanger Transmission direct mount compatibility for steel bikes, inside detail It requires a 13mm thick dropout with a pretty big 30x40mm flat area on ...