Park Tool DAG-3 Derailleur Hanger Alignment Gauge

The Park Tool DAG-3 derailleur hanger straightening tool is essential to detect and repair bent or misaligned derailleur hanger, which are often the cause of shifting problems.

The Park Tool DAG-3 derailleur hanger alignment tool features a completely new design, developed and built to allow easy and accurate work. The caliper can measure shift eye alignment on wheels from 16 to 29 inches. A 360-degree measurement is easily possible despite luggage racks and seat stays thanks to the rotating caliper.

The long, precision-pressed aluminum body is manufactured to exact tolerances and provides great leverage for adjustment.

Technical details of the Park Tool DAG-3 Derailleur Hanger Alignment Gauge

• Compatible with 16" to 29"+ wheels (ISO/ETRTO rim sizes from 317 to 630+)
• Replaceable M10 threaded tip
• Low-profile head fits low clearance thru-axle derailleur hangers and Shimano® Direct Mount hangers
• Length: 16.5” (420mm)
• Weight: 22.75 oz. (645g)