Originally Posted by Fraser

I think that goes without saying. The discussion is just about the effect on ride quality of rim size and sidewall height. Assuming that you are trying to maintain the same rolling circumference, a bigger rim obviously equals less sidewall. If you throw in different brands, RFT or non-RFT, passenger or light truck construction etc, then, sure, you may get a different ride comfort result but the discussion then has the potential to sink to often meaningless anecdotal evidence.