Quote:
Originally Posted by sfax
Won't you balls up the mileage and speedo if the circumference changes?
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Yes if you significantly do so.
If you go to the wheels and tyres forum on the 3 series E9x there's a handy calculator which saves us all being students if Pythagoras.
Ill probably go with the 245/50/18's the difference in price isn't ridiculous I'm also in no particular hurry so will keep an eye on eBay and gumtree.