Agreed, and I have done so but for a multiple rotations to get better accuracy. Unfortunately sometimes we want to know how a tire we don't own yet compares to stock size. Or we are thinking about changing to a larger rim size and want to know what sizes of tire for it will get the gearing change we want or help us avoid a gearing change we don't want. Then we need accurate rev/mile data from some external source. Mark
Don Hanson wrote: > Better yet...measure your tire. Mark where the tread is, on pavement as > the tire is normally inflated and while on the van. Mark the tread of the > tire, then roll the van till the tread mark hits pavement again. Mark > that. Measure. > Divide by appropriate system of measurement used in your home country...US > would be distance in feet into 5,280 feet= rotations per mile. > > On Fri, Oct 14, 2011 at 9:14 AM, Jeff Schwaia<vw.doka@gmail.com> wrote: > >> Those calculators are good for an approximation, but each brand (or model) >> will have a unique specification. You should be able to find the actual >> specification if your tire is still in production. Tire Rack ( >> tirerack.com) >> is really good at providing this type of information. >> >> Cheers, >> >> Jeff > |
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