Is there any disadvantage to running 16 x 8 rims? as to 15 x 8?.... im getting BFG liberator a/t's... and the biggest tires they carry for the 15 inch rim is a 31 10.50..... so im planning on getting the 285/70R/16 which are about 32 1/2 inches.... i was planning on getting new rims either way, but wanted to check on this first.... thanks for any help/suggestions