Park Tool Derailleur Alignment Gauge and straighenner for keeping drive train in correct alignment. *Compared to DAG-2. Adjusts to fit 20 inches to 29 inches+ wheels. Gauge bar made of heavy gauge, chrome plated steel. Improved clearance and reach to fit more frame/hanger combos including low clearance thru axle derailleur hangers*. Replaceable threaded tip. Tighter tolerances for improved accuracy*. Upgraded, large inner shaft for added strength*.
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