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Recalibrating speedo for tire size

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Old 07-12-2008, 12:24 PM
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Recalibrating speedo for tire size

What is the easiest way to recalibrate the speedometer on an 05 for increased tire size? The instant conversion on Discount tires website said I should be actually doing 68 when the speedo is at 65. I changed from 265-70R/17 to 295-70R/17. Im going to check with GPS today to see how far off I actually am.
Old 07-12-2008, 01:14 PM
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I wouldn`t even worry about that small of a difference in speed....most vehicles aren`t dead-on accurate from the factory.

The dealer CAN do it , but the local dealer here is too lazy to do it , so they just say it CAN`T be done ...even though others have had it done

I bought the Superlift Tru-Speed for mine , but it`s still hard to make it perfect.
Old 07-12-2008, 04:34 PM
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Smarty will do it to I believe 44". Mine is 37" and I se the tire size at 36.25 and it is dean on with a GPS.
Old 07-12-2008, 05:55 PM
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Dodge can do it as well with there computer programer it' takes about 10 min
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