Originally Posted by Kasé Zomé
Yep. Notice that there's only a 1" delta between front and rear? This is so that your tire sizes will maintain the same ratio. So if you upgrade, maintain the same ratio as much as possible to maintain the balance of the car. However, if you're only interested in aesthetics, then it doesn't matter. Run what you think looks good.
I though that only matters for the tires. If the tire sizes maintain the balance, doesn't it not matter what wheel sizes you go with, besides the fact that the actual weight of the wheel will be different?