I have 15x8 rims, (4" backspacing), with 31x10.5 mickys. With just the 4 inch rsg, you have to trim. So if you want to save the front fenders just in front of the door bottoms, as well as all of the front bumber, you need at least a 1.5 body lift. If you don't mind a little trimming, they'll work just fine.

2001 Sportage, 4" RSG lift, Cragers W/31 10.5 Micky Claws, Warn Manual Hubs, 16 gallon Pro Street Fuel Cell, Custom Snorkel, K&N Filter.
1989 Dodge W250.