What happens as a result of tyre pressures being well below the recommended levels?

When tyre pressures are significantly below the recommended levels, two main issues arise:

1. Fuel consumption increases: Under-inflated tyres create more rolling resistance, meaning the engine has to work harder to maintain speed. This directly impacts fuel efficiency, leading to increased fuel consumption.

2. Tyre wear increases: Insufficient pressure causes uneven wear on the tyres, which can lead to faster deterioration and necessitate more frequent replacements. It can also result in blowouts or loss of control over the vehicle.

The third option, "Pollutant emission decreases," is incorrect. In fact, the opposite is true; increased fuel consumption typically leads to higher pollutant emissions because the vehicle burns more fuel.

In German traffic regulations, maintaining proper tyre pressure is crucial for safe driving, efficiency, and reducing environmental impact. Regular checks and adjustments are advised to ensure compliance with these safety standards.