Or it's just a little bug, and instead of 0.1 or 0.01 being used as a variable, then 1.0 is used instead. It is a tech preview after all, and they've not claimed it's bug free.
The visual tyre deformation, I'd wager, isn't included yet. It is a tech preview after all.
Can't wait for all the damage (particularly transmission and engine) to stop some of the silly lap times. Didn't know about the fresh tyre bug - I'll give that a go tomorrow and see how quick fresh tyres make me (0.000001 seconds quicker probably).
Back in the day I was happy to drive LFS like a sim, but over the years I've tended to drive all sims as if they were a bit more real. I'm slower, and I still crash (very very very easy to misjudge stuff in a sim that you'd simply NEVER EVER do in reality), but I get more satisfaction from it. I also don't use unrealistic setups any more, even if I know they're quicker. That would probably change if I ever joined a league though!