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      03-08-2013, 02:11 PM   #23
JOHNBMWM5
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Quote:
Originally Posted by johntomferg View Post
Wow, that is really odd. The 245/45R18 are a smaller circumference than the 295/35R19s...

Sure the winter set isn't 245/45R19s?


Tire Size: 245/45R18 295/35R19 245/45R19

Circum: 83.821" 85.2312" 86.963"

%: 98.35% 100% 102.03%
Well I have a GPS system in the car and with those wheels on it's spot on
19" back on and it shows 2/3MPG out (over) on speeds above 50 MPH
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      03-08-2013, 05:05 PM   #24
stealth.pilot
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Quote:
Originally Posted by chrisratz View Post
My speed is overstated by 5%, so same as yours.
BMW programmed the car to overstate the speed. It can be fixed by coding.
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