Easy to fit, solving the problem of stripped threads quickly. You will need a M12mm drill (0.472"). (a) Your existing hanger, back and front, preferably having removed from your bike & rear derailleur, OR.
Dropout Saver Insert / Rear Mech Hanger Frame Saver Nut. SIlver Allloy
Single Speed Chain Tensioner: Lightweight Aluminum Construction, High Elastic Design, Anti-Slip Wheel, Compact Rear Dropout Adapter, Functional Changing Device Suppor
Derailleur Hanger Alignment Tool Engraved Scale Rear Dropout Hanger Tool
Yhenlovtt Fixie Bike Chain Adjuster Tensioner for Single Speed Track Bicycle Alloy Rear Dropout Chain Guide Mount Bolt Kit(Black)
QuivyLivy Bike Chain Tensioner, Fixed Gear Adjuster, Single Speed Bolt, Track Bike Tightener, Cycle Part, Steel Chain Keeper, Rear Dropout Screw, (1pc)
Gear Mech Hanger Derailleur rear dropout fits Boardman Carrera inc. screws
