17's are not too small, tires are cheaper, they weigh less, 18" and up have shown no improvement in handling over a 17" setup. I run 17X9 up front and 17X10.5 out back. The max you can run out back is 7" of backspacing and that's pushing it, 4" is the max of "front" spacing that will fit in the wheel well as well. I wish I would have gone with 17X8's up front instead of 9" because there really isn't a tire made for a 9" wheel that is the same diameter as a 315-35-17 other than the 275's which can cause rubbing issues. A 245 is close to the same, but it fits better on a 8" wheel. I'm running 245's up front and they are a bit too stretched for my liking.
Here's a pic, I love the staggered look... I wouldn't even concider running anything but a 315 out back. Wide is mean as hell looking.
Here's a pic, I love the staggered look... I wouldn't even concider running anything but a 315 out back. Wide is mean as hell looking.