Just watching the 1996 Italian GP and was reminded of this thread. Hakkinen clips the untethered tyres and sends 2 of them rolling out onto the track. Luckily avoided by all drivers but a dangerous hazard nonetheless. I reckon they should be removed from LFS entirely, unless they're only placed for safety, to contain a car that goes off the track (though that might end up in more chaos with our current collision model/detection).