Great Tim, thanks a bunch for sharing those video!
Those video are from a Replay right? I can't here any tires sounds. I was like usual making "air-driving", a.k.a. turning my wheel at the same time than you, with my lips making extra engine noise (does you're guys say that, air-driving", like "air guitar" in English?, I guess yes) My immersion went down a bit as I had also to make the squeezing sound of the 4 tires independently at the same time (that's hard, try it instead of laughing)
It's probably a know problem as it's too big to be avoided: Tires squeezing sound in live, no tires squeezing sound from Replay (Replay settings at max)... I didn't see it reported (don't flame me for sure I missed posts about that).
Short video showing this problem (B660):
I can't wait to try those Indy cars and those layout in real time with Screeching sounds of my tires sliding on the oval. Screeching (it's not "Screeching" the exact word...skiding? squirting? something like that) and the wall, the wall, who want to kiss my car, gently approaching near my tires, and, and, AND, YEAH ! Can't wait!
I was a huge player of Indy 500 on PC, playing with a little Tandy joystick! The game I was finalizing was delayed 2 weeks as I was playing Indy 500 instead of debugging my own game!

Raaaaah! souvenirs Souvenir!