Me? No I don't, which is one reason why I am taking so long in pushing the button. But I'll say this, the primary concern is almost always keeping the overall diameter the same and that you maintain the staggered tire. You are 100% correct in considering interference, thus the reason for offsets...as I understand it.

While I'm sure aerodynamics, the computer, and overall performance comes into play when this car was designed/manufactured, I just don't know how much of an impact there is when 1) the difference between the front and back overall diameter is .94 and 2) the manual recommends you use the same size tire in the rear as in the front. I strongly believe a lot had to also do with marketability (sorry, not drinkability) and therefore cosmetic. More than likely I won't go this route this year as I want to try out the General UHP's...and even my wife thinks it just won't look the same (meaning not as good). Hopefully by the time I need tires the next time, they'll last longer than the 18.5k the Conti's did and, they'll have figured out a better rubber composite for HPT's.


BTW Skills Senior I passed this thread on to Shark067 as I know he would love those rims on his XF...maybe his soon to be wife will buy them as a present....LOL