I tested nK for some days now, and there are quite odd things in it...
It began with me trying out how long the tyres would last... So I did some laps...
By chance, I found the first oddity: there seems to be a magic handbrake fitted to all FF1600 that holds the car stationary on the steepest part of the track without applying any form of brake, whether you're in neutral or disengaged the clutch doesn't matter, it won't start rolling again...
Then, my tank was running empty...
At the pitstop, I ran into the next oddity: I seem to have gotten in a McDonald's Drive-Through... "I'd like a Hamburger to my new tyres, thank you"... I've never seen a driver ordering new tyres and fuel when he's stopping...
After racking up over 200 kms on one set of tyres I gave up to try it another way... And since we're on the part of being stationary - standing still breaks the whole simulation...
I tried to destroy the tyres by heat or excessive wear by putting it against a wall and doing a burnout until the tyres would explode... After I depleted a full tank this way I went back to the pits and couldn't believe what I saw: not only did my burnout apparently nothing to the tyre's wear, the temperature in all tyres was 25° C...
So it seems there is no way to actually destroy your tyres... They're degrading - yes, but apparently simulating a puncture or tyres driven down to the canvas isn't possible in the most hardcore sim of them all...