Personally, I think you're wrong.... You might be right, but I have 5:13s in my 14FF and have a stock cover and NOTHING rubs! The ring gears don't get any larger in diameter.... The r&p only changes how many teeth, not diameter... In other words, Hypathetically, a set of 2:73 don't have a diameter any smaller than a set of 5:13s.... /forums/images/graemlins/deal.gif