Park Tool Derailleur Hanger Alignment Gauge DAG-3 Size:NONE giving you protection against rotational

giving you protection against rotational forces for an added level of security on top of the full-wrap in-mould polycarbonate shell with EPS liner

The BTS-1 is a precision tool system for ensuring threaded bottom bracket shells are properly aligned and faced

- Syncros seat post

Center bore for axle clearance is 20 mm

Park Tool Derailleur Hanger Alignment Gauge DAG-3 Size:NONE giving you protection against rotationalAn 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,