[joyridin']

Sorry, I do not buy that. Regardless of how much grip you have, you have sidewall flex going around turns. Get a set of 17" wheels will good tires on the same car and the 17" will outperform the 15" every time.

Besides, I personally like the look of 17" tires on certain cars like Cobras. I would not go any bigger myself, but that is just my preference.