Park Tool DAG-2.2 Derailleur Hanger Alignment Gauge BikeType_Urban-Hybrid densely packed knobs and is

densely packed knobs and is made with a rubber compound that guarantees grip

and a presta valve core tool

Adventure Geometry

Built to last

Park Tool DAG-2.2 Derailleur Hanger Alignment Gauge BikeType_Urban-Hybrid densely packed knobs and isDERAILLEUR HANGER ALIGNMENT GAUGE A misaligned derailleur hanger can cause skipping, missed shifts, and wreak general havoc on your bicycle's drivetrain. The DAG 2. 2 is an indispensable shop tool that can be used to both measure and straighten misaligned derailleur hangers, diagnosing and solving many shifting problems. Compatible with virtually all derailleur equipped bicycles, and adjusts to work with wheels from 16" to 29"+.