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Tire Calibration/New Size

Discussion in 'Gen 2 Prius Care, Maintenance and Troubleshooting' started by brighamwj, Jun 10, 2008.

  1. brighamwj

    brighamwj Member

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    Tire Calibration/New Size ?

    After reading other posts, I have not found the answer to my question.

    :confused:Would someone please tell me if the Calibration function will re-calibrate for a new size 195/60/15 tire (the increased rotations per mile) to show the correct speedo/odo and GPS location? :confused:

    I want the tires for slightly better handling with more rubber on the road.

    I don't want the extra miles on the odo or drive with speedo a speed slightly faster than I am traveling.

    I don't know if there are wheel sensors that can measure the circumference travel and update the computer during re-calibration or if the calibration will only reset the 24.4 diameter of the stock 185/65/15 tires?

    Thank you in advance for the information
     
    #1 brighamwj, Jun 10, 2008
  2. patsparks

    patsparks An Aussie perspective

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    The difference to the US standard 185 - 65h 15 is tiny so I don't believe you need to change anything. This (195 x 60 x 15 is the standard tyre size in markets outside North America except Europe where 16 inch wheels are standard.

    Tire Size Comparison

    Specification Sidewall Radius Diameter Circumference Revs/Mile Difference
    185/65-15 . . 4.7in . 12.2in . . 24.5in . . . .76.9in . . . . . 824 . . 0.0%
    195/60-15 . . 4.6in . 12.1in . . 24.2in . . . .76.1in . . . . . 833 . -1.0%
     
    #2 patsparks, Jun 10, 2008
  3. brighamwj

    brighamwj Member

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    Yeah I guess you are right. I am worried about putting 1000 extra miles on the odo over 100,000...that will be the day that I make tires last that long.

    On another thread an owner states he has over 100k miles on his Michelin Hydroedges...Unbelievable.

    Are your tires the 195/60-15 down in OZ?

    I saw your mileage on another thread so I know that size won't cause a substantial hit to mpg/kpg.

    Cheers.
     
    #3 brighamwj, Jun 10, 2008
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