Hey guys I have a 2004 Fx4 Supercrew with leveling kit.. Whats the biggest rims and tires i can put on my truck without rubbing and regearing.. Im to put 20-10 rims and 35" 12-50 -20 mud grapplers... If i can put 20" on my truck what back spacing should i get!! Im A fireman in my town and cant seem to get off long enough to go to texas to buy the rize lift so im going to upgrade my rims and tires first.. Any comments will help your fellow Ford junkie

 

As a general rule on a 4x4 with a leveling kit you can fit 35x12.50's using the OEM wheels or 33's with aftermarket wheels. If you go with a 10 inch wide wheel, I'd suggest at least 5.5 or 6 inches of backspacing.