Hello all!

I've been interested in American Rallying lately, and watched some footage etc. and I've noticed a few things. Like the lack of studded tyres. It's forbidden, right? But WHY? I saw some incar footage from Ken Block in the 100 Acre Wood rally recently. The stage was really fast, and while non-studded tyres keep the speed down in the corners, it doesn't have quite the same effect when you blast along long straights. In a lot of corners he slides towards the ditch, and with that speed you really can't do much if you come in too fast. With studded tyres I think you would be safer.

Is it to keep speeds down they're not allowed, or is it just because of the road damage they create?

Also, why do a lot of EVOs remove their spoilers/wings on the back?