Park Tool DAG-2.2 Derailleur Hanger Alignment Gauge Brand_Aeroic Over pronation is one of

Over pronation is one of the main contributors to incorrect tracking of knees during a cyclists pedaling phase due to internal rotation of tibia and femur

Sole Guards - Replaceable

With numerous race wins under its belt and untold miles of backroad adventures

Creatively making good use of steel

Park Tool DAG-2.2 Derailleur Hanger Alignment Gauge Brand_Aeroic Over pronation is one ofDERAILLEUR 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"+.