Park Tool DAG-3 Derailleur Hanger Alignment Gauge Tool

An alignment gauge is essential for diagnosing and repairing bent or misaligned derailleur hangers which are often the source of shifting problems. The DAG-3 features an all-new design, engineered and built to be light, accurate and versatile.

Who's this item for: Mechanics looking for a long-lasting, precise and versatile tool to re-align their derailleur hangers.

Combatibility: Compatible with 16" to 29"+ wheels (ISO/ETRTO rim sizes from 317 to 630+).

Length: Length: 16.5” (420mm).

Weight: Weight: 22.75 oz. (645g).

Extra info: 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 obstacles, allowing 360-degree measurement. The long, precision-extruded aluminium body is built to exacting tolerances and provides ample leverage for making adjustments.