Park Tool  DAG-2.2 Derailleur Hanger Alignment Gauge

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An indispensable shop tool, the Park Tool DAG-2.2 derailleur hanger alignment gauge measures and straightens misaligned derailleur hangers, solving a high percentage of shifting problems.


  • Gauge bar is made of heavy-gauge, chrome-plated steel
  • Adjusts to fit 20 to 29 in. wheels
  • Threaded tip is replaceable (replacement tips not included)
  • Large inner shaft adds strength
  • Tight tolerances offer improved accuracy
  • Improved clearance and reach to fit more frame/hanger combos than past versions, including low-clearance thru-axle derailleur hangers
  • Compatible with virtually all derailleur-equipped bicycles, including those with Shimano Direct Mount hangers
  • Length: 16 in. (41 cm)

Made in USA.

View all Park Tool Bike Drivetrain Tools

Technical Specs

Item #211220
Best Use




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