UDH hangers kitUDH HANGERS KIT OLD FRAME, NEW TRICKS Not all frames are ready for the future. Yours might be closer than you think. This kit lets you run SRAM T Type derailleurs on selected Production Prive frames that predate the UDH standard. No need to retire a perfectly good bike just because standards moved on. Think of it as a discreet but effective upgradelike fuel injection on a classic flat six. WHAT IT DOES The UDH Hangers Kit converts your frame to accept