Park Tool DAG-3 Derailleur Hanger Alignment Gauge D3 This saddle rail bracket is

This saddle rail bracket is designed to be used with the Flare and TraceR

the sole of your shoes must have a central oblong where the memory position part will be screwed

And with a notch in the rear of the light – it sits well on posts and bars

To achieve this

Race: 9-42T (9-10-11-12-13-14-16-18-21-25-30-36-42)

Park Tool DAG-3 Derailleur Hanger Alignment Gauge D3 This saddle rail bracket isAn 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 obstacles, allowing 360 degree measurement. The long,