What must you take into consideration when checking tyre pressure?

The combination of load/number of passengers in the car and tyre temperature is crucial for maintaining proper tyre pressure. In Germany, the Karlsruhe Institute of Technology advises that tyre pressure should be adjusted based on the load the vehicle is carrying. This is important because a fully loaded vehicle requires higher tyre pressure to ensure optimal performance and safety.

Additionally, tyre temperature affects air pressure. When tyres heat up from driving, the air inside expands, raising the pressure. Hence, it is essential to check the pressure when the tyres are cold for accurate readings.

The material of the wheels, while important for performance and safety, does not directly influence tyre pressure checks, making it an irrelevant factor in this context. Following these guidelines helps ensure vehicle safety, fuel efficiency, and prolongs the lifespan of the tyres, aligning with German road traffic regulations.