OK I've read that moving up to a 18x9 inch wheel (from the stock 17x8) will increase rotational mass even if the two wheels weigh the same. The wheels and tires I'm looking at weigh about 5lbs more per wheel and tire than stock. Will I really feel this much with daily driving? I have a 06 gt coupe. I don't race but I don't like the thought of losing power either.