Stock size for the A6 4.2 is 235-50-16. In the all season, there are virtually no great options. Anyone know an alternative size for the 16 inch rims on the 4.2 that work well? Can I use 225-50-16 or 245-50-16? Any help would be appreciated.

We've used 225/55R16 or 215/55R16 for winter tires, should work fine for others as well.<ul><li><a href="http://www.tirerack.com/a.jsp?a=AR8&amp;url=/tires/index.jsp">Tires</a></li></ul>

<ul><li><a href="http://forums.audiworld.com/a6/msgs/110254.phtml">A6/S6 tire options</a></li></ul>

Thanks to both of you for your replies. Appreciate it.

Dunlop SP 5000 has worked great for my Mercedez Benz C class.
They do have it at your A6 stock size.