Park Tool - DAG-3 - Derailleur Hanger Alignment Gauge S3-Size-PAWL STEELb3 When conditions do turn sloppy

When conditions do turn sloppy

like those specific for e-bikes

Built-in light/vibration sensor

The glassfiber reinforced FastCage is strong

You can carry a lot in very little space and without paying for excess weight

Park Tool - DAG-3 - Derailleur Hanger Alignment Gauge S3-Size-PAWL STEELb3 When conditions do turn sloppyPARK TOOL DAG 3 DERAILLEUR HANGER ALIGNMENT GAUGE 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