MEROCA Bike Hook Aligner Bicycle Derailleur Alignment Corrector 360° Rotation Bike Tail Hook Measure Straighten Repair Tools

Brand：Meroca

Material:aluminum alloy

Weight:about 720g

Function: Used for bicycle derailleur hanger alignment and correction

This is an indispensable shop tool that can be used to both measure and straighten misaligned derailleur hangers solving a high percentage of shifting problems.

Simple to use

The Derailleur Hanger Alignment Gauge can help solve a multitude of derailleur shifting problems, most notably with index shifting systems. This tool is extremely steady in operation.
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. The alignment of the derailleur hanger is accomplished by applying pressure to the tool's arm. The results can be checked instantly.