Quote Originally Posted by David Love AI27 View Post
LOL..,. where do you measure??? top of the tire??? center line of the hub??? bottom of the tire??? front of the tire or rear or the average of the two?? If you run an "alternate" tire do you have to adjust your suspension because Toyo can't provide the spec tire???... How much air was in when you measured???.. is it pre race or post race???... hotter tires stand taller and skinner due to higher pressures... with or with out the driver??? What were your camber settings?? do you have to go back through tech if you change the camber??

The main thing is you better know the thickness of the tow plate if you measure to the outside...
8.3 Fenders / Quarter Panels
Track width will be measured using two metal plates similar to the Longacre #7950 toe plates placed flush against the tire. Measurements will be taken three inches from the ground at the front and rear of the tire and averaged to calculate final track width.
Seems pretty well layed out. Don't know what an "alternate" tire is, pretty sure there's a rule in there saying we are running RA1's. Are you seriously saying that hot vs cold will give any measurable (with a TAPEMEASURE!) difference? Really?

I have no problem with Glenn's legitimate question. For all he knows, we could have used a 1" bit of wood to measure.