Well HankStar. If you truly think about it...GTRs are low to the ground cars whereas even if oyu raise the height, it wouldn't make a difference because Gtrs have a lot of speed and thus having the wheels spin faster. Therefore the cars would have trouble maintaining that speed on another surface. GTRs are made for tarmac with the type of tires they use would just make 'em slip all over. I'm sorta a car geek so for me, this is sorta common sense. Do GTR cars have Hybrid tires? Lol. Maybe a dumb question to ask.