I used to run 225 50 15's and decided I simply could not get the power to the ground or carry the speed in the turns, I went a bit extreme, and upped to 295's up front and 315's in the rear, not I have more tire than cna use due to lack fo weight, my car weighs only 2105 lbs, and the throttle requires a delicate touch to keep they dorm spinning, loking back I think 265's on a 10" wheel would have yielded about as much result with less clearance issues and less weight, each of my CCW's with tire weighs about 50 lbs, not heavy enough to be an issue at my hp to weight ratio but might be a bit much