I have 30X9.50s with my wheels, which i think have 3.75"BS, they rub my mud flaps at full lock. Because that tire is wider, Its going to rub more. Even though its not taller, there is more being turned, and when turned to full lock, the "length" of the tire is longer and will therefore rub some. I can't garuntee how much, if any, but mine rub a little, like i said on my mud flaps, w/o them I'd gain about 1/2 inch. Hope this helps, and isn't too confusing.