This Service Kit from All-City Cycles includes a derailleur hanger, axle stud, and nut. The derailleur hanger is compatible with any frame out there, but you'll need the included axle stud and nut for mounting to an All-City frame. - Alloy construction - Replacement derailleur hanger sold separately (Part Number DP0814) - Axle Stud and Nut are compatible only with All-City Space Horse, Gorilla Monsoon, and Cosmic Stallion Titanium frames