Before revision: Rolling resistance The power for overcoming the tires' rolling resistances is given by: where g is gravity, nominally 9.8 m/s^2, and m is mass (kg).
After revision: Rolling resistance The power for overcoming the tires' rolling resistances is given by: where g is gravity, nominally 9.8 m/s^2, s is the slope (rise over run), and m is mass (kg).