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### Coefficients of Rolling Friction

Coefficients of Rolling Friction for Wheels with Steel and Pneumatic Tires

McKibben and Davidson (Agri. Eng., 1939) give the data in Table
calculator below on the rolling resistance of various types of wheels for typical road
and field conditions. Note that the coefficient f_{r} is the ratio of resistance
force to load.

Moyer found the following average values of f_{r} for pneumatic rubber
tires properly inflated and loaded: hard road, 0.008; dry, firm, and well packed
gravel, 0.012; wet loose gravel, 0.06.

Rolling Resistance

Source:

Marks Standard Handbook for Mechanical Engineers

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