Over steer
on a constant-radius turn, the steer angle will have to decrease as the speed ( and lateral acceleration ) is increased. In this case, the lateral acceleration at the CG cause the slip angle on the rear wheels to increase more than at the front. The outward drift at the rear of the vehicle turns the front wheels inward, thus diminishing the radius of turn. The increase in lateral acceleration that follows causes the rear to drift out event further and the process continues unless the steer angle is reduced to maintain the radius of turn.