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Old 09-24-2011, 11:04 PM   #126 (permalink)
HighMPG
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Join Date: Sep 2011
Location: California
Posts: 145

Super Duty - '12 Ford F250 Super Duty XLT Long Bed Super-Cab
90 day: 15.29 mpg (US)
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I have 13" tires!!!!!!!!!!!
NOW WHAT!
AND I ONLY FOUND 2 TIRES ON TIRERACK that make my oen size!
The other option is the current tire I have on my corolla which is a 175/70/13.
I am thinking going back to the oem 155/80/13 tire size will same me some drag/resistance.
OR
I can go up to a 185/60/14 and keep most of the spedo difference in check at .09% difference but the tires will get heavier and 1.1" wider which might reduce my efficiency/MPG and raise rolling resistance, un-sprung weight and other factors??
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