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      10-06-2017, 03:35 PM   #5
vtsng
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Drives: Pre LCI E90 325i SGM
Join Date: Jun 2012
Location: GVA (BC) / Seattle (WA)

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Quote:
Originally Posted by ejw2011 View Post
The tire size should be 225/60r17. Diameter is 25 vs 27.8,
Circumference is 78.4 vs 86.8, revs/mile is 832 vs 752.
The big differences from 17 to 18" causes these errors if you don't get the correct tire specs. 225/60r17 will be in allowable specs. Check out tiresize.com calculator comparing the 245/50r18 vs 225/45r17 look
Thanks this information is very helpful. I'll definitely keep that in mind when I get new winter tires!
Appreciate 0