What are the possible consequences if the wheel nuts are not re-tightened following a tyre change?

When wheel nuts are not re-tightened after a tyre change, it can lead to serious consequences.

Firstly, if the wheel is not properly secured, it can detach from the vehicle while driving, which poses a significant danger to the driver and other road users. This is why option 2 is critical; ensuring that the wheel remains attached is a fundamental safety requirement outlined in German traffic regulations.

Additionally, if the wheel is not adequately tightened, it can become damaged due to excessive movement or stress. This might not happen immediately but can lead to long-term issues affecting the vehicle's performance and safety.

The third option, while potentially valid, focuses on the tyre’s ability to stay attached to the hub rather than the wheel as a complete unit. However, the most pressing concerns from a legal and safety perspective revolve around the wheel's detachment and potential damage.

Thus, selecting all relevant consequences is vital in understanding the full scope of risks associated with improper maintenance after a tyre change, aligning with German traffic laws that emphasize vehicle safety.