This jogged my memory. Yeas ago at OCIR, I watched Bad Brad Anderson TA/FC) in the pits, measuring tires just like in this video. I thought he was simply checking to be sure both tires were the same size. There had been a couple of instances where racers had just put on the tires, not realizing one was shorter or taller, and the car would go left or right at the launch. Anyhoo, this was a great video. Thanks Shannon.