Union GH-121 Rear Derailleur Hanger

The Union GH-121 derailleur hanger is the mount that secures the rear derailleur to the frame. Use it to replace a bent or broken part on Fuji, Marin and Jan Janssen bikes, after comparing the replacement with the original.

• Secures the rear derailleur to the frame, made from aluminium and 56 mm long
• Fits externally with 2 screws, without removing anything else
• Derailleur mount with a 10 mm diameter thread and 1,00 pitch
• Suitable for Fuji, Marin and Jan Janssen, to be compared with the original part
• To choose the right part, check the 13 mm mounting hole spacing and 40 mm distance to the derailleur hole

Technical specifications

• Product type: Derailleur hanger, model GH-121
• Frame mounting holes: 2
• Material: Aluminium
• Colour: Chrome grey
• Overall length: 56 mm
• Hanger mounting hole spacing: 13 mm
• Centre distance between upper mounting point and derailleur hole: 40 mm
• Upper mounting thread: diameter 4 mm, pitch 0,70
• Derailleur mounting thread: diameter 10 mm, pitch 1,00
• Indicative compatibility: Fuji, Marin, Jan Janssen