George wrote: >> I would think that the maker's rev/mile specification is measured according to an industry testing procedure while holding constant the other variables which affect the measurement, such as speed, load, inflation pressure and temperature. I can neither confirm nor refute this, tho I suspect George is correct. For example, the data sheet for the LT195/75R14/C Michelin XC LT4s which I am currently running specifies 45 mph as a baseline for their Revs/Mile of 824. One could reasonably speculate that 45 was perhaps selected as some sort of real-world average betwixt city and highway driving, both of which are far different from parked in the driveway. As George suggests, it may even be an industry standard
Jeffrey Earl 1983 diesel Westfalia "Vanasazi" http://www.vanthology.com/
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