The drop-off in ride comfort when moving to a 17" package is negligible. Now going to 18" or 19" is another animal. In my mind, the 17" package is the sweet spot. Without a doubt, the 18" and 19" wheels look terrific; I think you will find that most owners who have gone to those sizes did it primarily for cosmetic rather than performance reasons. Most 18" and 19" wheels weigh significantly more than the stock 16"'s, and most of that additional mass is at the rim of the wheel, further inhibiting performance. A nice light, strong forged 17" X 7.5" wheel with decent-performing lighter tires (you would be surprised at the variation in tire weights between competing brands in the same size) is my idea of the ultimate setup for our SVT's.
