One trick we use when checking toe on the race car is to stand a piece of sheet metal or plywood firmly up against both front tires, and measure the distance between them front and rear. It's a lot easier than trying to scribe tire treads and fumble with a tape measure to the tread centerline.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!