Park Tool DAG 2.2 Derailleur Hanger Alignment Gauge Accessories Shop Tools

Park Tool DAG 2.2 Derailleur Hanger Alignment Gauge. The Park Tool DAG 2.2 Derailleur Hanger Alignment Gauge is an indispensable shop tool that can be used to both measure and straighten misaligned derailleur hangers. Having the ability to properly align the derailleur hanger solves a high percentage of shifting problems. The DAG 2.2 is new for 2015 and features the following improvements over the previous DAG 2 version: an upgraded large inner shaft for added strength, tighter tolerances for improved accuracy, and improved clearance and reach to fit more framehanger combos including low clearance thru axle derailleur hangers.