You’ll notice a little < on the side wall. We run them in that direction, but I’ve also heard from a reputable source that that’s BS. We do it anyway.
On a HOT day, you can cook them in one round of practice. What we do is run old tires until the last practice session, them run the new ones for a few laps and let them cool. If you’re talking about Summit this weekend, you don’t have to worry about over heating them!!! To say the least. Just run them. They’ll be fine. Just don’t kill them in the first round of practice.