Reply to "Wheel fitment"

In general, narrowing the rear track width, relative to the front track width, will decrease traction at the rear. The only way you can get your 18" wheel combination to work is with a set of custom, hubcentric spacers, that will convert the wheel's offsets from incorrect to correct. When using spacers, you should also change to stronger 1/2"-20 studs. When you add the cost of spacers and studs to the cost of the wheels, you'll find the Campi clones are not that expensive. If you can't afford them now, just wait until you can.

Also, when choosing tire sizes, try to stick with sizes that are (or were) OEM on something. That way, you should always be able to find tires. Stay away from "tuner" tires. As an example, I think it will be a long time before 335/35-17's disappear. After all, they were OEM on the Dodge Viper for many years. There might only be one company that makes them but at least there will be one!