A moving bicycle remains upright primarily due to the conservation of angular momentum and gyroscopic effects. When a bicycle leans to one side, the angular momentum causes the front wheel to steer in the direction of the lean, helping to right itself. While gyroscopic forces contribute to stability, the cyclist's steering inputs and the bike's trail play a crucial role in maintaining balance. Observations indicate that even in challenging situations, such as near collisions, a bicycle can stay upright due to these physical principles. Understanding these dynamics reveals the complex interplay of forces that keep bicycles stable while in motion.