Park Tool DAG-2 Derailleur Alignment Gauge

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Park Tool

As one of the most exposed components on your bike, a rear derailleur can take a lot of abuse. Over time this abuse can effect the alignment of your frame itself. Ensure great shifting performance and accurate hanger alignment with the DAG-2. This heavy-duty tool threads into the hanger and measures the distance to different positions on the wheel. Adjustments can be made by applying leverage to the tool and moving the frame back into alignment.

The DAG-2 has been updated with a longer measuring pointer and threaded stud as well as a longer and more more narrow alignment boss that fits a large range of bikes.