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      12-19-2012, 11:37 PM   #7
slicer
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Drives: '13 E92 M3
Join Date: Jan 2009
Location: San Diego, CA

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Quote:
Originally Posted by STi_traitor View Post
This is just from what I have heard and what I am running now. 235/40, I don't have the ZCP package but I don't think that makes a difference. The reason behind the 235 is that it helps to cut through the snow with the thinner tire. Looks stretched like crazy in the rears but I figure it is recommended and the safer bet to keep my car in one piece for next summer. I have heavy snow days, not sure how your weather gets.

Check your driver side door, I believe it has the recommended sizes with PSI.
BMW actually recommends 235/40/18 in the front and 255/40/18 in the rear (on their winter 18x8, 18x9 wheels). They don't recommend 235/40/18 on the 9.5" rear wheel. That tire is too narrow for a 9.5" wheel.
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'04 E46 M3 - Jet Black - Sold
'08 E90 M3 - Alpine White - Sold
'13 E92 M3 - Silverstone II - Sold
'13 E92 M3 - Alpine White - Ohlins TTX, Fall-Line Suspension Arms/Bushings, AP Racing BBK, OE GTS Aero, Cobra Seats, Akrapovic GT4, GMG 4-point, BBS E88