Park Tool Derailleur Hanger Alignment Gauge (DAG-3) size-750ml Installation is quick and easy

Installation is quick and easy

Powerful hydraulic disc brakes combine with 2

Front-to-rear fold provides increased strength and stability

and you'll have a lifetime of readability

Upper: Synthetic Polyurethane

Park Tool Derailleur Hanger Alignment Gauge (DAG-3) size-750ml Installation is quick and easyAbout Park Tool Derailleur Hanger Alignment Gauge (DAG 3)An alignment gauge is essential for diagnosing and repairing bent or misaligned derailleur hangers, often the source of shifting problems. The DAG 3 features an all new design, engineered and built to be light, accurate and versatile. The sliding indicator can measure derailleur hanger alignment against bicycle rims of any size, and rotates out of the way to clear seat stays, racks, and other