Quote:
Originally Posted by 27litres
Ah - thanks Neil! That's given me the confidence I need to go a wider tyre at ET35!
I've got the 19x9 ET35 RS6 rims, and wanted to do better than 255/40/19.
So by having those sizes, does a 295 give you a closer rolling diameter to a 255 at 5% lower profile, or does it depend on the rim size?
I'll check my own on a tyre calculator before I commit anyway...
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Yes the rolling radius difference front to back is only 0.81% difference so well within the recommended 1% difference so as not to cause quattro faults or issues. Front diameter is actually 686.4mm vs rear at 680.9mm and the rear wheels will sit 22.1mm closer to the rear suspension strut (fine as there is more space at the back than the front) and the outer rims at the rears poke out 16.1mm more than the front. I have also lowered the front on my D2 with coilovers to get rid of the silly large arch gap at the front and to help offset the rear wheels being 2.75mm lower on ride height than the front. 
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Audi A8 D2 3.7 Quattro Sport 1999 FL - Melange
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