Toopre Bicycle Derailleur Hanger Alignment Gauge Professional

The Derailleur Hanger Alignment Gauge can help solve a multitude of derailleur shifting problems, most notably with index shifting systems. This tool is extremely steady in operation.The tool threads directly into the derailleur hanger. The gauge bar holds a gauge which marks the distance to the wheel. The gauge then is rotated with the wheel to the 3, 6, 9, and 12 o'clock positions, noting any differences in measurements. The alignment of the derailleur hanger is accomplished by applying pressure to the tool's arm. The results can be checked instantly.Gauge bar made of heavy gauge, chrome plated steelAdjusts to fit 20 inch to 29 inch+ wheelsReplaceable threaded tipUpgraded large inner shaft for added strengthTighter tolerances for improved accuracyImproved clearance and reach to fit more frame/hanger combos including low clearance thru-axle derailleur hangersColour:silverMaterial:Stainless steelSize:410 x 165mmPackage Contents:1 * Hook correctorOnly the above package content, other products are not included.Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.