Park Tool - DAG-2.2 - Derailleur Hanger Alignment Gauge Stock Item:Null Park Tool SLIDING GAUGE HOLDER - DAG-1/2/2.2 Lightweight aluminum housing with durable

Lightweight aluminum housing with durable plastics for optimal heat dissipation

Extension Length: 340mm

Before we get confirmation though

Headtube Size       42mm       52mm

Park Tool - DAG-2.2 - Derailleur Hanger Alignment Gauge Stock Item:Null Park Tool SLIDING GAUGE HOLDER - DAG-1/2/2.2 Lightweight aluminum housing with durablePARK TOOL DAG 2. 2 DERAILLEUR HANGER ALIGNMENT GAUGE The DAG 2. 2 is an indispensable shop tool that can be used to both measure and straighten misaligned derailleur hangers solving a high percentage of shifting problems. 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