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Winter Tire Question.

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Old Dec 12, 2013 | 07:37 AM
  #1  
yvnrg1981's Avatar
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Default Winter Tire Question.

Ok, so I'm taking delivery of 2014 S7 Later on today. I got it in white with the black optics package. Now the question is in the tire size 265/35-20. If i get same size in winter tire they run at 304, but if i get if with aspect 40 they are 244. 240 cheaper. I check the tire size calculator and saw that my speedo will be off by about 2 mph. Ill also be raising the car by 13mm with that. Now what do you guy think? Any really bad affects of this? I'd rather invest the extra cash in APR engine tune come summer time.
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Old Dec 12, 2013 | 09:54 AM
  #2  
clintb's Avatar
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From: Calgary, AB
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Originally Posted by yvnrg1981
Ok, so I'm taking delivery of 2014 S7 Later on today. I got it in white with the black optics package. Now the question is in the tire size 265/35-20. If i get same size in winter tire they run at 304, but if i get if with aspect 40 they are 244. 240 cheaper. I check the tire size calculator and saw that my speedo will be off by about 2 mph. Ill also be raising the car by 13mm with that. Now what do you guy think? Any really bad affects of this? I'd rather invest the extra cash in APR engine tune come summer time.
Stick with the correct Tire size

You don't want any margin for error in the winter ice/snow
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Old Dec 12, 2013 | 01:03 PM
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My tire guy recommend going a little smaller (width wise) at 255/35-20 and it opens up more tires at that size outside of the Dunlop WS 3D. I am going with Blizzak's LM-32.
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Old Dec 13, 2013 | 07:28 AM
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Originally Posted by yvnrg1981
Now what do you guy think? Any really bad affects of this? I'd rather invest the extra cash in APR engine tune come summer time.
No real bad affects, just the indicated speed will be off. Your MPG's will be off by the same percentage.

The general consensus is to use the smallest wheel that will clear the brakes and use a narrower tire for winter tires. The smaller wheel gives you more tire choices at a lower cost. The narrow tire is said to cut through the snow down to the hard pack but it is less important when traveling on mostly plowed roads.
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Old Dec 13, 2013 | 11:16 AM
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+1 to tenspeed's comments

another potential view is that larger diameter rubber can provide a bit more cushion to protect rims against rougher winter pavement with similar impact to speedo/mpg calcs.
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