Tire Size Calculator

Discussion in 'General' started by drimportracing, Jun 20, 2010.

  1. drimportracing

    drimportracing Pizza driver: 61,000+ deliveries

    This is good if you are considering changing your wheel or tire sizes to increase fuel economy and want to know how far off your speedometer or odometer will be.


    - Dale
  2. CapriRacer

    CapriRacer Well-Known Member

    A Word of Caution:

    This, and many other tire calculators, do not factor in that the rolling diameter of a tire is about 97% of the overall (freestanding) diameter. As a result, their revs per mile are typically off 3%.

    This affects many other calculations, especially when they do gearing and MPH calculations.

    But for comparing tire sizes, the error is small enough to ignore.

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