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- Provides a simple, accurate means for checking hanger alignment and for straightening hangers that are not properly aligned.
- The tool threads directly into the derailleur hanger. The gauge bar holds a gauge to mark the distance to the wheel.
- The gauge 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.