Originally Posted by footie
Has anyone tested how much slower in acceleration 275front and 295rear would be compared to stock sizes?
I'm guessing it will be noticeable.
Doubtful. 18" vs. 20", if the 18" are light and 20" are particularly heavy, will be measurable and probably fairly consistent. I doubt that tire width will be above the noise of the measurement for acceleration. Furthermore, the weight of wider rears will be offset by a bit more traction, given an identical compound and all else "apples to apples".