JH>So I was thinking about increasing the diameter of the tires on my 2012 Ford
JH>Escape. Stock is 135 x 70 x 16 and in the forums, people are going up to 145
JH>x75x16 for an inch more height along with H&R lifting springs which give
JH>another inch. In as much as the final drive ratio has changed then the
JH>speedometer is off.  Someone said that nowadays, you can get software that
JH>will recalibrate the speedo as well as reprogram the power curve of the
JH>engine to accomodate the change in your tire diameter that would help with
JH>the slight decrease in gas mileage.  I have done performance flash before on
JH>a VW gti but never thought about how you can recalibrate the speedometer
JH>digitally.

IF you have a recalibratable Electronic Speedometer check out this web
site.

http://www.autometer.com/tech_faq_answer.aspx?sid=2&qid=40
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 þ SLMR 2.1a þ Typo Tom Strkes Again