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Simple and accurate to check the alignment of rear derailleur hanger.
Designed to measure and straighten misaligned derailleur hangers.
Solve most derailleur shifting problems, especially those with index shifting systems.
Fits to most wheels, 20~29inch
Colour:Electroplating multicolor Material: alloy Size:Length: about 43.4cm Package Contents: 1 x Bicycle Derailleur Hanger Only the above package content, other products are not included. Note: Light 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.
CCBUY Bicycle Derailleur Hanger Alignment Gauge Wheel Straightening Correction for 20-29Inch Bike Wheels Bike Repair - BSOIGB2NS