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      10-17-2012, 10:52 AM   #5
colson79
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Drives: 2012 X3 35i DSB
Join Date: Jul 2011
Location: Wisconsin

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Quote:
Originally Posted by Mako View Post
No reason to go down to 17"

we have the 19" M Sport for summer (pissed BMW didn't offer performance summer tires, so we just left the all seasons on).

For winter we went with 18" and Blizzak WS60 tires, no reason to go to 17", doesn't look right, especially with M Sport or 35i in general. Its a heavy car, with all wheel drive and snow tires, there isn't going to be any performance difference in going 17" vs 18" In fact you might be looking at the same width of tires either way! 225/235 can fit on 18" I just ordered some 18X8.5 wheels for my 335i and am putting 225/45 tires on it.
If you go with 225/45/18 the outside diameter will only be 25.97 which is over 3/4 of an inch smaller. This is going to mess up your speedometer. For 18" the 245/50/18 is 27.64" which is about the same as the stock 19" wheels
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