Park Tool DAG-2.2 Derailleur Hanger Alignment Gauge

Park Tool DAG-2.2 Derailleur Hanger Alignment Gauge A straight derailleur hanger is vital for perfect shifting and Park Tool’s DAG-2.2 Alignment Guage is the perfect tool checking and straightening the hanger after a knock or if experiencing shifting issues. It works with wheels from 20” to 29+” and has been upgraded to work with a wider variety of frame and derailleur hanger combinations. The tolerances have also been improved for greater accuracy and the threaded tip is replaceable for years of service.