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2004 - 2008 Ford F150 General discussion on the 2004 - 2008 Ford F150 truck.

33x12.5x17 MPH difference

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Old 01-18-2011, 01:12 AM
  #11  
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http://www.1010tires.com/tiresizecalculator.asp
Old 01-18-2011, 09:24 AM
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Thanks for that link.

The compare feature makes it a lot easier to use than other metric converters.
Old 01-18-2011, 09:42 AM
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my 35's put my speedo off 6 mph and the stock tires were 27's.

I second the GPS thought. its the easiest and best way to check.
Old 01-18-2011, 10:55 AM
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when i switched mine from 31s to 33s, this is how it reads (18" wheels): off 4 at 70, 3 at 60, 2 at 50, 1 at 40



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