Park Tool: DERAILLEUR HANGER ALIGNMENT GAUGE… DAG-2.2

Gauge bar made of heavy gauge, chrome plated steel Adjusts to fit 20″ to 29″ wheels Replaceable threaded tip Upgraded large inner shaft for added strength* Tighter tolerances for improved accuracy* Improved clearance and reach to fit more frame/hanger combos including low clearance thru-axle derailleur hangers* Fits Shimano® Direct Mount hangers