Countersteering
（重定向自Countersteer）
![A hypothetical curve on dry asphalt](/Images/godic/202501/06/Perfectcornerbike1440.gif")
![Image montage showing different stages of countersteering. Here, a scooter is countersteered to turn left.](/Images/godic/202501/06/Countersteering_with_scooter_-_Montage_of_four_images1440.png")
![Graphs showing the lean and steer angle response of an otherwise uncontrolled simplified model of a typical bike, traveling at a forward speed in its stable range (in this case 6 m/s), to a positive steer torque (to the right) that begins as an impulse and then remains constant. It causes an initial steer angle to the right, a lean to the left, and eventually a steady-state lean to the left, steer angle to the left, and thus a turn to the left.](/Images/godic/202501/06/Countersteer_response1440.JPG")
![When countersteering, the front wheel first moves out a little in the opposite direction of the turn.](/Images/godic/202501/06/Inoutrak1440.gif")
Countersteering is used by single-track vehicle operators, such as cyclists and motorcyclists, to initiate a turn toward a given direction by momentarily steering counter to the desired direction ("steer left to turn right"). To negotiate a turn successfully, the combined center of mass of the rider and the single-track vehicle must first be leaned in the direction of the turn, and steering briefly in the opposite direction causes that lean. The rider's action of countersteering is sometimes referred to as "giving a steering command".