Tire Size
I've been doing a lot of looking at tires lately as it's time for a new set for my duallie. My 4x4 (2000) came with 235,85,16's on them, which I know is bigger than they used to be. Most places I've talked to (and there are many!) won't go any bigger than that without putting on spacers, and some places don't even want to do that. The solution that most suggested was to go with a more aggressive tread pattern, adding height in rubber rather than air.
The solution for me is that I'll be putting on a set of Rickson 19. 5" rims here as soon as the tax refund comes in. With those, I can go up to a tire that is 33 3/4", as opposed to the 30" of my 235's. It's not a cheap solution, but there's a price to pay to look cool!