I have a 2000 explorer spt. I have a buddy of mine that knows where I can pick up a set of new 15X8 Jeep rims with 30X10.5 super swampers real cheep. I know have (30") 255/70R16 on my truck now. I would like to know if I could use 15X8 Jeep rims with 30X10.5 tires without spacers?