There are dozens of different derailleur hangers available and one model is seldom interchangeable with another. (a) Your existing hanger, back and front, preferably having removed from your bike & rear derailleur, OR.
Aluminium Rear Derailleur Gear Mech Hanger Bike Parts For BOARDMAN CC116 Road Bike Tail Hook Derailleur Hanger Bracket Dropout(Black)
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MOST WIDELY USED Rear Derailleur Gear Mech Hanger Dropout 9 x Colours - CC007
