Park Tool DAG-3 Alignment Tool Derailleur Hanger

A guide tool is essential for diagnosing and repairing bent or misaligned derailleur hangers, which are often the cause of shifting problems. The DAG-3 features a completely new design that is lightweight, precise, and versatile. The sliding indicator can measure the alignment of the derailleur hanger on bicycle rims of any size and can be rotated out of the way to avoid seat stays, racks, and other obstacles, allowing for a 360-degree measurement. The long, precisely machined aluminum body is manufactured with exact tolerances and provides great leverage for adjustments.

FEATURES:

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