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Archive for November 3rd, 2009
Rolling resistance
Posted by Bren from Kansas City, MO, US on November 3, 2009
I work for a Freightliner dealer and I am submitting a quotation on a few tractors with G395 fuel max steers and G372A drives (295/75R22.5 14ply). The customer is requiring that I state the rolling resistance of those tires. Can you help me locate that info? I can’t find it anywhere. Thanks!
It is difficult to explain but, we do not publish rolling resistance numbers. Rolling resistance is measured on a machine that compares the values obtained to a control tire. On any particular day, with any particular machine at a certain air temperature, inflations pressure and load, you will get a rolling resistance value.
Another company doing the same test on a different machine with different conditions will most likely get a different value. Imagine you and I getting on our respective bathroom scales and comparing our relative body weights. Different scales, different conditions and, probably, not a true comparison of our weights.