I just got my first TC and since it is also my main vehicle, I joined this forum to learn from and share experiences upgrading the vehicle in areas such as wheels, radio, lamps, speakers, and so on. As an example, I am definetly going to upgrade the wheels to the common ST style wheels but have not made up my mind because I am still undecided on the size: 17 vs. 18 in. I am sure that to most looks better with the larger 18's but still not convinced because that size does not leave a lot sidewall while maintaing proper wheel diameter and I am afraid I'll be lowering cargo capacity. What do you think? The pic is a photo shop of my estimate on how 18's will look. Can you share your 17's and 18's? Thanks.