Quote:
Originally Posted by SPL
The tire must thus continuously deform as it rotates to accommodate this difference. This deformation must be a primary cause of tire rolling resistance. Am I correct?
Stan
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Yes. There is some data on it HERE:
http://thecartech.com/subjects/auto_eng/report1w.htm .
I used the Tire Static Radius as a baseline. To be absolutely precise, the Tire Rolling Radius should be used, but it is a function of speed, loading and also tractive effort, which is hard to define as it takes into account the power used, pavement or rolling surface and several other variables. Several benchmarks in the industry use 46% of the undistorted tire diameter as the static radius at published inflation. Since we typically overinflate, the actual number may be higher, which in turn would decrease the axle RPM per rolling mile.
RFB