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      01-07-2012, 07:45 PM   #2

Drives: 2014 Shelby GT500
Join Date: Apr 2008
Location: Vancouver, BC

Posts: 929
iTrader: (4)

I use an app called "Clinometer" on my iPad to set mine. Good to 1/10th of a degree. I hold it against a piece of hardwood that's cut at an angle so that turned one way it exactly fits across 18" rims and the other way fits 19". I've checked the readings a number of times against a plumb bob and vernier caliper and they're dead on. The same app works on the iPhone as well, so I use that occasionally too.