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

Shifting to a low gear while traveling at a high speed can lead to significant mechanical issues and safety risks. In your selected combination of answers, both points are correct:

1. The rear wheel may lock: This occurs because the sudden increase in engine braking from the low gear can overwhelm the traction of the rear wheel, causing it to lose grip.

2. There is a high risk of crashing to the ground: If the rear wheel locks, it can lead to loss of control and increase the likelihood of an accident or a fall, particularly on two-wheeled vehicles.

These outcomes highlight the importance of selecting an appropriate gear that matches the vehicle's speed for safe driving, as emphasized in German traffic regulations. Proper gear shifting is essential not only for maintaining control but also for the overall safety of the vehicle and its occupants.