Lean angle refers to the angle at which a motorcycle or bicycle tilts when navigating a turn. It is crucial for maintaining balance and traction, allowing the rider to corner effectively without losing control. A greater lean angle typically indicates a sharper turn, but it also increases the risk of losing grip if the angle exceeds the limits of the tires' traction. The lean angle is influenced by various factors, including speed, road conditions, and the design of the vehicle. Riders often use techniques to manage their lean angle, ensuring they can safely navigate curves while maximizing speed and stability. Proper understanding of lean angle is essential for both amateur and professional riders.