SUPER B Derailleur hanger alignment gauge TB-1946

​Designed to control the alignment of rear derailleur hanger and solve most derailleur shifting problems, especially those with index shifting systems

Directly threads into the derailleur hanger and the gauge bar hold a gauge that marks the distance to the rim

Rotates the gauge with the wheel to the 3, 6, 9, and 12 o’clock positions to check potentialdifferences in measurements

Apply pressure to the tool’s arm to the derailleur hanger to check the results instantly

Use of a perfectly trued rear wheel is imperative for proper alignment of the hanger