What might happen if you shift to a low gear while travelling at a high speed?

Shifting to a low gear at high speed can cause the rear wheel to lock because the engine’s resistance forces the wheel to slow down abruptly. This sudden deceleration can cause the bike to lose traction and slide. As a result, there is a high risk of crashing to the ground due to the loss of control. This rule highlights the importance of choosing appropriate gears matching your speed to maintain stability and safety while riding or driving.