Trying to figure out new wheels/tires
I am pretty much wheel/tire illiterate, but learning. It seems a little complicated. I currently have rims on my rig that are 18x8.5 J (not sure what the J is for). These came with the van along with the 305/65R18 tires. They are huge, and old. I almost had a blowout on the highway, but averted disaster. The spare looks like a stock rim with a 285/75R16. So it's time to replace all 5. The problem I'm having with the 18s and 305s is that the front tire rubs on the sway bar (or something) under the van, significantly restricting turning radius and no doubt shortening the life of my tires.
I'd like to go smaller, but 16" seems like a leap that would visually be too much. So I think I want to go to a 17" wheel and smaller tire, in the hopes that it will help the rub issue and the wallet. All the 17" wheels I see however are 17x9 which is deeper that the 18x8.5 that I now have. Would this be an issue? Also, I don't know what kind of lift I have, only that it's a Quigley.
I like the Mickey Thompson setup as posted by Shredmobile as they are similar to the design of my existing wheels. Just want to make sure they'd work.