The depth caliper is the only one with perfect accuracy. The digital caliper is not as reliable as I'd hoped, as the prongs can get stuck in a groove in the tread pattern. I will list my measuring methods and results.:
Gel Game 3
Bar Clamp method - 3.05 cm
Depth Caliper - 2.95 cm
Paper - 3 cm
Digital Outside Caliper - 3 cm
Last edited by newyorkstadium : 02-20-2013 at 01:49 PM.
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