Accurate measuring system for wheels, axles and frames. When the driver steers the truck straight ahead, he/she assumes that the wheels and chassis roll straight ahead. The driver controls the front wheels and decides on their direction. But the rest of the wheels can be rolling in another direction if the axles are not correctly positioned in relation to the longitudinal center line of the truck or if the axles are bent. It doesnโt have to be a big displacement of the axle to cause a noticable effect.
