A single-axle trailer has an actual gross weight of 600 kg. What is the minimum possible vertical load?

For a single-axle trailer, German traffic regulations require that the vertical load (Stützlast) on the tow bar must be at least 4% of the actual gross weight of the trailer, but not less than the minimum specified by the manufacturer. In this case, 4% of 600 kg is 24 kg. This ensures safe towing and good road holding. Choosing a higher percentage, like 10% or 15%, is not required and could exceed the limits of the towing vehicle or tow bar. So, the correct answer is 24 kg, or 4%. This rule helps distribute the trailer’s weight safely between the vehicle and road, preventing accidents or unstable driving.