Abstract: A wheel balancer has a spindle for mounting a wheel/tire assembly thereon, a motor for spinning the spindle about its longitudinal axis, and at least two sensors for sensing imbalance forces. A set of calibration coefficients for the wheel balancer are determined solely from the measurements made during a set of calibration spins and from knowledge of the amount of imbalance mounted to the rotating spindle during the calibration spins, without any knowledge or measurement of the relative geometry of the balancer. The set of calibration coefficients and other calibration data is stored in an electronic memory for subsequent use in balancing a wheel/tire assembly. During balancing, a wheel/tire assembly mounted on the spindle is spun and the corresponding output signals of the sensors are measured and recorded.