Bike Derailleur Alignment Tool, Derailleur Hanger Alignment Gauge Strong Hardness for Bicycle Derailleur Hanger Proofreading

The main body is made of aluminum alloy with anodized surface, which reduces the weight while having strong hardness.

Stainless steel calibration clear on measuring rod for accurate measurement, rubber at both ends, used to adjust and fix the measuring rod, and the contact of the is wrapped with rubber to avoid scratching the ring.

Rotate the lock handle, adjust the measuring rod, lock the sliding sleeve, adjust the distance between the measuring rod and the ring, determine the value of the measuring rod, measure the deviation between the tail hook and the ring.