def identify_tyre_dynamic_rolling_coefficient(r_wheels, r_dynamic):
    """
    Identifies the dynamic rolling coefficient [-].

    :param r_wheels:
        Radius of the wheels [m].
    :type r_wheels: float

    :param r_dynamic:
        Dynamic radius of the wheels [m].
    :type r_dynamic: float

    :return:
        Dynamic rolling coefficient [-].
    :rtype: float
    """
    return r_dynamic / r_wheels
