I know this has been scrutinized to no extent... but here i go...
I have the BBS RC's on my A6 2.7T... and was thinking of upgrading to 18x8.5's. Will 255/40/18 fit my car? I don't want to ride on rubber bands... That's the set up on an RS6. Because the circumference of the tire will be slightly larger will that "upset" the quattro/odometer/speedometer? And am I trading off performance for style? Will someone please help me with this?
ImolaS4? Anyone... :-) thanks a bunch

 

Anyone... ?

 

18s will DEF. fit on your a6. 'rubberbands' don't feel like rubberbands if you get the right tire . i have 19s (see specs on sig) on my a6 and i'm getting sport suspension. i have yet to sacrifice the ride or OEM circumfrance, and have aquired better handling to boot.

the only way you can 'upset' the Quattro is if your circumfrance is inconsistant on any of the four tires. the only way the odometer or speedometer can be 'upset' is if you get a smaller or larger circumfrance than the OEM tire size. so what you want to do is stick as close to OEM circumfrance as possible; this can be done with less tire (the correct tire), and more rim (staggering doesn't matter).

click on http://www.tirerack.com/tires/tires....eModel=Direzza and scroll down to DIREZZA DZ101

this tire is awesome!!!! it won't even feel like you have 'rubberbands' on b/c it has some road noise elimination feature. you also won't scratch up your expensive wheels b/c the design of the tire eliminates curb rash. of course these aren't the cheapest tires but, as you probably well know quality costs $$$$$