Just going to say this, The white RE Amemiya car, used in time attacks for street cars, runs a 255 size all around, and holds the fastest RWD record on their japanese track. The extra weight, and drag caused by the tire would likely be less effective. However, these guys running those wide fronts, are also winning, and the top of their racing sector. So I have no room to correct them

It's all a matter of compound selection as Aaron said.