1 x Bicycle Rear Derailleur Hanger. Used to change the small flywheel into the large one to make the bicycle faster. For example, the 36t flywheel is replaced by the 42t flywheel. Net weight: about 18g.
CANSUCC Bicycle Frame Rear Derailleur Hanger Extender Road Bike Gear Tail Hooks
CANSUCC Bicycle Frame Rear Derailleur Hanger Extender Road Bike Gear Tail Hook
Rear Derailleur Hanger,MTB Road Bike Gear Hanger Rear Gear Mech Frame Tail Hook
CANSUCC Cycling Rear Derailleur Hanger Mountain Road Bike Tail Hook Extender
