You probably want to true those tires down anyway. Normally on sedan I cut down to 2.30 before I even run them, and I shave off normally .1 on my 12th scale tire as well. Cars normally do not run well with large tires, it is like having large sidewalls on a full scale car. The car will scrub alot of speed in the corner and handle funny since its digging in, instead of floating ontop of the track.