The Park Tools DAG-3 derailleur alignment gauge is a must have for DIY bike mechanics. It’s durable, easy to use, and aligns your derailleur hanger so your bike shifts properly.
Park Tools DAG-3 Full Review

The Park Tools DAG-3 derailleur alignment gauge is a must have for DIY bike mechanics. It’s durable, easy to use, and aligns your derailleur hanger so your bike shifts properly.