Bike Tail Hook Calibration Tools Derailleur Hanger Alignment Gauge for Mountain Bicyclered

Feature: 1. Adopting quality structure and telescopic measurement, more convenient and quick, lightweight and compact size. 2. 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. 3. 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. 4. The alignment of the derailleur hanger is accomplished by applying pressure to the tool s arm. The results can be checked instantly. 5. 2 different colors for you to choose, meet your different needs. Specification: Condition: 100percent Brand New Item Type: Derailleur Hanger Alignment Gauge Material: aluminium alloy Optional Color: black, red Weight: Approx. 467gSuitable range: 26 27.5 29 700C. Package List: 1 x Derailleur Hanger Alignment Gauge