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      08-05-2012, 05:20 AM   #14
pmmjarrett
Retired Paratrooper
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Drives: 2006 BMW Z4 3.0i Sport
Join Date: Jul 2012
Location: North Carolina

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Quote:
Originally Posted by DSC_OFF View Post
thats weird b/c when i used the wheel offset calculator here:

http://www.e90post.com/forums/forumdisplay.php?f=12

i put in oem settings of: 8.0", et 50, 225/40/18
new wheel: 8.5", et 42, 255/35/18

and it spits out: "2mm MORE clearance on the strut side, and the outside edge of the wheel will EXTEND an extra 14mm"
That calculator is flawed. It only calculates the wheel clearances and ignores tire sidewall clearances completely.

The only dimensions it's calculating for tires is the diameter and it's using that to calculate speedometer error.
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