Park Tool DAG-2.2 Derailleur Hanger Alignment Gauge
- Ensures rear derailleur hanger is parallel to wheel
- Mounts to hanger and measures distance to wheel
- Gauge arm also functions as cold set correction tool
- Chrome-plated steel construction
- Fits 20" to 29"+ wheels
- Improved clearance and reach works on more frame/derailleur hanger combos, including low clearance thru axle derailleur hangers