i was gonna get 15'' MT classic II's to go with my 31's, but i'm thinking a set of 15'' cobra R's with my 31's might look pretty cool. i don't want a 17'' rim b/c then i can't use my 31's, or get them in the future. if i were to get 17's, i would want a tire that would give the equal height that the 31's would to cut down wheel gap but they would most likely be expensive tires or too thin. and no lowering!