Bike Tail Hook Calibration Tools Derailleur Hanger Alignment Gauge for Mountain

Adopting quality structure and telescopic measurement, more convenient and quick, lightweight and compact size. Indispensable tool, can be used to both measure and straighten misaligned derailleur hangers solving a high percentage of shifting problems. Most notably with index shifting systems. The tool threads directly into the derailleur hanger. The gauge bar holds a gauge which marks the distance to the wheel. The gauge then is rotated with the wheel to the 3, 6, 9, and 12 o clock positions, noting any differences in measurements. Condition: 100% Brand New Item Type: Derailleur Hanger Alignment Gauge Material: aluminium alloy Optional Color: black, red Weight: Approx. 467g Suitable range: 26Celsius27.5Celsius29Celsius700C