Single-track vehicles like bicycles use countersteering to initiate a turn by momentarily steering in the opposite direction of the desired turn ("steer left to turn right"). To effectively navigate a turn, the combined center of gravity of the rider and single-track vehicle must first be leaned in the direction of the turn. This lean is caused by a momentary steering input in the opposite direction. Countersteering is sometimes described as "providing a steering order" by riders.