Ya man we provide tehcnical help only, the opinions are what happen, unless you ask specfically anyway if you like them get them and dont let your parents get all pissy when you put them on. Parents tend to get angry when we cahgne our cars, i know mine do.

 

I understand about saving money by using tires you already have, but it's a shame to go with 18's when 19's work so well on the B6.

A bunch of guys run staggered and claim no problems. As stated below, the trick is to make sure that the front and rears have exactly the same rolling diameter. Tire size calculators like the one at TireRack or at http://www.1010tires.com/TireSizeCalculator.asphelp, but beware that tires are not always the size claimed on the sidewall (I've seen them differ by >10%). Since you've already got the tires you can compare them directly. You'll not know the exact rolling diameter until they're mounted, though, but if they are the same unmounted and the rim widths you choose don't stretch or balloon them differently on the front and rears then they'll probably end up "close enough".

If it was my car I wouldn't do it though...

 

stick with the same size tires staggering them can screw your car. as stated above if you get diamters right you will porbably be close enough to not cause damage to your center diff. now the question you need to ask your self is: Are looks really that important? Is haveing the look of a wide tire in back really worth a butt load of money when my center diff explodes?

 

I had staggered wheels on my car, 205 in the front and 255 int he rear dont ask why, different rims and everything, the only thing i noticed was a little bit more oversteer and the back was alot harder to break when power sliding. so in my opinion just mroe grip.

 

Apparently stretch or 'ballooning' the tire has little to no effect on the rolling circumference. I don't get it either, but hey, that's what tire rack says. I guess it makes sense, as you can't shrink a steel belt!
Staggered is safe as can be, if you do it right! It'll make your fat Audi understeer even more than it already does, but whatever--throw a big rear swaybar on it to compensate (if you push the car to those limits).

 

Yeah, I think I'm going non-staggered.

But, I wanna stick with 18's man.. I know 19's look good, but it cost a lot more.... and if I drop my car onto 18's it will look perfect.

Thanks for the tips/help though everyone