Hunter’s 6-sensor WinAlign® HD alignment system has been enhanced with the capability to easily measure and align twin-steer vehicles. The updated version of WinAlign® HD includes two sensors on the reference (rear) axle and two sensors on each steering axle to ensure that they are timed to turn at the exact same rate while simultaneously ensuring parallelism. Six-sensor technology makes this the only system in the world that maintains its reference through the entire procedure, eliminating sources of error that previously existed while also increasing speed and efficiency.