The original 17" tires and wheels from my '06 are in storage (guess the tires might be too old to use by now, but I keep them in large plastic bags, mounted on the wheels and fully inflated, in my 68 degree basement), and I'm running an atypical setup with 245-40-18's on the front, and 275-40-18's on the rear, mounted on TSW Indy 500 wheels. Rear fenders have been rolled, and I have no scraping or rubbing problems, although I might bottom out in rear on a severe dip in the road if rear seat adult passengers are on board (sorry, no children allowed). I'm considering zero drop springs or drag bags to handle THAT issue. The rear tires are 26.66" high vs. 25.72" high in the front... note that 25.68" is the tire height of stock tires and 17" wheels. My problem: ALL FOUR tires are wearing on the Inside. Alignment Camber measures are: Front Left -0.7; Front Right -0.4; Rear Left -1.2; Rear Right -1.2. A suggestion by a mechanic was to adjust cambers to more positive setting. Question is: Is that the correct/best solution? Are wheel spacers of any merit to solve this issue?? (I'm thinking spacers are for width/rubbing issues). I don't notice any negative handling issues with this unusual tire/wheel set up, but I don't race on street, strip, or track (YET?!). I just don't want to waste time & money by prematurely wearing out expensive tires! Do you have the answer??