The performance increase with a 17" wheel is indisputable. (assuming the same weight) First off, lowering the sidewall helps with "sidewall flex". When I first put the BAT Suspension on my car I had the stock 16's on, I noticed an improvement in handling right away. Shortly afterwards I got a set of 17's with 215/45/17 tires, that is when I suspension REALLY came alive! It's like a whole new car now. If you were close I would put my stock wheels back on, take you for a ride, then change to the 17's and take you for a ride. You would notice a difference and change your tune real fast.
