Thread the gauge directly into the derailleur hanger. Align the derailleur hanger by applying pressure to the tool arm.
TOOPRE Professional Bicycle Derailleur Hanger Bike Tail Hook Alignment Tools New
TOOPRE Professional New Bicycle Derailleur Hanger Bike Tail Hook Alignment Tools
Bicycle Derailleur Hanger Alignment Corrector Professional Detachable Accessory
eMagTech Bicycle Derailleur Hanger Rear Derailleur Hanger Mech Derailleur Hanger Compatible with Giant ANYROAD ADV/AVAIL ADV/DEFY ADV/PROPEL ADV Pro Disc, 380000016
YINETTECH Bicycle Derailleur Hanger Rear Gear Mech Hanger Rear Derailleur Hanger Bike Tail Hook Compatible with Cube Axial WS/Agree C/Cross Race, # 10063 / # RR 16-03240
