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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Technical Forums > All-Wheel-Drive (Xi / xDrive) Talk > Comprehensive Xdrive Tire sizing chart



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      06-03-2015, 11:24 AM   #1
cmg5461
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Comprehensive Xdrive Tire sizing chart

I found the list of 17-20 inch tires Michelin makes pilot super sports in. I was curious if there were any other combinations that would enable us to go wider.

By no means do the widths on these charts mean the tires will fit without rubbing.

Green means front and rear and within tolerances.
There are also comparisons of how close to stock sizes the new sizes are (speedometer change)

17"


18"


19"


20" (why :P)


Attached is the excel file used for calculations!
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File Type: zip pss xdrive.zip (71.3 KB, 26 views)
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      06-18-2015, 12:14 AM   #2
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Great tables! I know some people like to go by number of rotations per mile as a second measurement as well. Obviously they correlate regardless, but the difference in tire size between manufacturers may lead to enough of a change.
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      06-18-2015, 10:15 AM   #3
cmg5461
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Quote:
Originally Posted by icyhot e92 View Post
Great tables! I know some people like to go by number of rotations per mile as a second measurement as well. Obviously they correlate regardless, but the difference in tire size between manufacturers may lead to enough of a change.
Yes, the percents will be the same. I also compared corrected rolling diameter, but that's just a percentage applied to each tire circumference. Didn't make any difference.

Generally speaking, the "255/35R18" is a standard. Any tire listed as this size needs to fall into a bucket of dimensions. There might be somewhat of a difference, but nothing major. If you're using the same manufacturer of tires, you can assume the tire size will differ (from the standard) the same per size tire, still yielding the same percentage.

Hope my charts helped you!
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