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Old 01-15-2013, 07:19 PM   #37
HBizzo88
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Join Date: Oct 2010
Location: california
Posts: 741
My Ride: 2002 bmw 330ci
Quote:
Originally Posted by Dave1027 View Post
It's because if you go 40 all around and go wider in back then the back 40s will be taller than the fronts and would roll at a different rate making the DSC throw an error. It's because the 40 number is not the height measurement but the ratio. This is why the 225/40/18 is the same height as the 255/35/18.

Look at this converter http://www.discounttire.com/dtcs/infoTireMath.dos
Interesting, thanks!
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