Park Tool DAG-2.2 Derailleur Hanger Alignment Gauge Nylon First we had to define

First we had to define better

246” diameter shafts

Tool Type: special tool

Extra-long sleeve that folds over the brace and prevents slipping

Park Tool DAG-2.2 Derailleur Hanger Alignment Gauge Nylon First we had to defineQuit fiddling with your rear derailleur's barrel adjuster and address the issue of sloppy shifting at its source. Park Tool's DAG 2. 2 Derailleur Alignment Gauge helps the home mechanic identify and correct a bent derailleur hanger, and compared to the DAG 2 model it features a stronger shaft, tighter tolerances, and improved clearance and reach. The sliding arm encompasses wheels from 20 to 29in.