Park DAG-2.2 Derailleur Hanger Alignment Gauge

Availability: 4+
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Highlighted Features

  • Compatible with most 12mm thru axle drop out designs
  • Fits 20" to 29+" wheel sizes
  • Heavy gauge, chrome plated steel construction
  • Replaceable threaded tip
  • Improved, tighter tolerances for accuracy
  • Improved clearance/reach to fit more frame/hanger combos
  • Made in the USA
  • Lifetime warranty
  • Park Tool # DAG-2.2

So, your rear shifting is impossible to dial in, even after installing a fresh cable and housing, making triple sure your derailleur isn't bent, and spending way to much time in the repair stand getting your limit screws and cable tension perfect. The next step is to check your derailleur hanger alignment. Rather than grabbing a mallet, rock, or hammer and beating on it like a caveman until it visually looks aligned, the cheapest, fastest, and most frustration-free way to fix it is to use the Park DAG-2 Derailleur Hanger Alignment Gauge.

Up from the DAG 2.0, the DAG 2.2 now features a larger inner shaft to offer more strength when push comes to shove, tighter tolerances in design for more accurate derailleur hanger alignment, and improved clearances to fit almost all frame and dropout combinations.

Use of the DAG-2 is simple! Just thread the DAG 2.2 into your derailleur hanger, then rotate it from the top, bottom, and sides of the wheel to compare the gap between tool and rim at four different points on the wheel. After determining which way the hanger is bent, the long arm of the DAG-2 can be used to gently bend the hanger back into alignment.

This tool is compatible with almost all 12mm thru axle frames and fits 20" to 29" wheel sizes.