Derailleur Hanger Alignment Gauge - DAG-2 - from Park Tool USA

This tool is extremely steady in operation and is simple to use.

The tool threads directly into the derailleur hanger.

The gauge bar holds a gauge which marks the distance to the wheel.

The gauge then is rotated with the wheel to the 3, 6, 9, and 12 o'clock positions, noting any differences in measurements.

The alignment of the derailleur hanger is accomplished by applying pressure to the tool's arm.

The results can be checked instantly.

The DAG-2 is made of heavy gauge steel and is chrome plated for long life.

Weight: .95kg (2.1lbs) 

Park Tool Reference: DAG-2

About Park Tool :

Park Tool has been manufacturing bicycle specific tools since 1963.

Based in St. Paul, Minnesota, USA, Park Tool is the world's largest bicycle tool manufacturer.

A long-term dedication to quality, innovation, and customer service has made Park Tool the first choice of professional and home bicycle mechanics around the world.

Just visit your local bike shop - chances are that they will be using Park Tool tools for bike service / repair.

Related tags: Derailleur Park Tool