Originally Posted by ah2049
I would like to think that stress-wise the tire would be fine. I've put it around NJMP's "Lightning" track and it's had no trouble at 100+ mph. To me, it looks like the crack is right where the rubber is thickest. I'm assuming that's there to protect the rim, but I'd still hate to drive 3.5 hours just to fail tech
The stress is not because of the speed, but the bumps. You were just spinning the tires really fast at the smooth track. Now you are going to be pushing the rubber in at any bump.
I would get another set if were you (and had funds) if the tire blows and it is loaded (outside tire on a turn) you might damage the car a bit.
I would at least put it on the back wheels so it does not have to deal with braking or the weight of the engine.