1. Correctly install the wheel on frame to ensure that the wheel ring is correct without deformation;
2. Install the locking derailleur hanger or remove the derailleur from the derailleur hanger;
3. Lock the screw end of the rotating rod to the thread interface of the derailleur hanger;
4 With the rotating rod as the axis, rotate the main body to A direction, slide the sleeve rod, adjust the measuring rod, so that the low end of the measuring rod just against the end face of the wheel ring, observe and record the data of the measuring rod;
5 Rotate the main body 180° to point B, slide the sliding sleeve, adjust the measuring rod, so that the low end of the measuring rod is just against the end face of the wheel ring, observe the number of measuring rod shown, compared with the number shown at point A, if the difference is more than 3MM, it indicates that the derailleur hanger has a large deviation in this direction, which needs to be corrected;
6. Correction method: to pry the tail end of the main body near or away from the end of the wheel ring, so that the derailleur hanger has corresponding deformation, repeated detection, correction of A and B, until the two points are basically the same (reference: the difference is not more than 3MM);
7. The same method was used to detect and correct orientation C and D until the measurements at point A, C and D were basically the same.(Note: A/B/C/D refers to the 4 diagonal points on the end face of the wheel ring)
Specification:
Item Type: Derailleur Hanger Alignment Gauge
Material: Aluminum Alloy + Stainless Steel
Application: For Proofreading And Correction Of Bicycle Derailleur Hanger
Product Size: Length: Approx.396mm/15.6in
Weight: Approx.450g/15.9oz
Package List:
1 x Main Rod
1 x Rotary Rod
1 x Rotary Handle
1 x Measuring Rod
1 x Lock Handle