What is the difference between zGG and tzGm?
Last updated: 02.08.2024
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The zGG (gross vehicle weight) and the tzGm (technically permissible maximum mass) both refer to the maximum mass a vehicle is allowed to carry or tow, but they have different meanings.
zGG (gross vehicle weight)
- The zGG is the maximum total weight of a vehicle that is allowed on the road. It includes the curb weight and the maximum payload of the vehicle.
- The zGG is usually legally prescribed and must not be exceeded. It is important for road safety and infrastructure to ensure that vehicles are not overloaded.
tzGm (technically permissible maximum mass)
- The tzGm refers to the maximum technically permissible mass of a vehicle, including its load. Unlike the zGG, the tzGm does not take into account the weight of the occupants. It refers to the maximum mass the vehicle can carry according to the manufacturer’s technical specifications.
- The tzGm considers the load-bearing capacities of various vehicle components such as frame, axles, wheels, brakes, etc., and ensures that the vehicle can be operated safely without overloading the technical components.
Summary
In summary, the zGG represents the legal limit for the total weight of a vehicle on the road, while the tzGm is the technically permissible mass the vehicle can carry according to the manufacturer’s specifications. It is important to adhere to both limits to ensure the safety and reliability of the vehicle.
What changes from December 1, 2023?
From December 1, 2023, the tzGm (technically permissible maximum mass, registration certificate Part 1, field "F.1") will be used instead of the zGG (gross vehicle weight, registration certificate Part 1, field "F.2") for toll calculation.
Transition Period
Vehicles with a tzGm exceeding 3.5t, which were registered before December 1, 2023, and had a zGG of no more than 3.5t before December 1, 2023, can continue to purchase vignettes and tolls for vehicles up to 3.5t tzGm until January 31, 2029.
