yes you can get 18 inch rims, on my 20 tundra my snow tires were on 20 inch rims and my summer tires on 18 inch. this happened as i had a set of 20 inch studded tires off a gmc i bought 20 inch toyota rims for.
if i had a use for a ranger i would have one, but pretty much every big purchase i make i pretty much allways say to the wife yea but i dont have a ranger, i bought a house in nw nd using that.