How To Make A Derailleur Hanger Alignment Gauge Tool @RJTheBikeGuy
How To Make A Derailleur Hanger Alignment Gauge Tool @RJTheBikeGuy
Uploaded October 2017 | Updated September 2026, 3 weeks ago
I show how to make a cheap DIY derailleur hanger alignment gauge similar to Park Tool's DAG 2.2. This tool is used to straighten and align a bent derailleur hanger which can cause problems with shifting. This tool is meant for steel frame bikes with integrated hangers.

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How To Make A Derailleur Hanger Alignment Gauge Tool

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