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Old 10-14-2015, 07:26 AM   #9
JayG
On the slippery slope
 
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Join Date: Mar 2014
Location: Austin and Palm Springs
Posts: 3,793
Garage
You can get an inexpensive digital caliper at Harbor Freight. When on sale (just about all the time) around $12.

I measured my with some big washers that were thicker than the lip on both sides of the rotor and then subtracted the thickness of the washers.

Kind of hard to tell what 1 mm is with my fingers
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