keep in mind what class you want to run

if you have a prelude sh you'll be forced to run in stx...and if this were so, i would go no less than 16's just because of the street tire selection...there aren't any 235's or 245's in 15's...but the new hankooks and azenis fksomething something provide this size...

225's are now also offered more easily in the 16 inch wheel...another thought to consider