Will a 275/40/17 be to small for a '14 A6 car? I will likely mount them on some 10th anny 17x9 wheels from AM. I believe the 275/40/17 is about 26" or should I try to do a 28" set up instead? Mainly seeing how far I can go with the car without a tune and removing interior. So far my best is 12.79 @ 109 on the stock tires and 12.998 @ 110 on my 20s.