GVM - Gross Vehicle Mass: The maximum a vehicle can weigh when fully loaded as specified by the manufacturer. If towing the GVM also includes the TBM Tow Ball Mass.
ATM - Aggregate Trailer Mass: Total weight of the trailer fully loaded. Including the tow ball mass.
GTM - Gross Trailer Mass: Weight of the fully loaded trailer on the axles when it is coupled to the tow vehicle. The actual GTM is less than the ATM as some of the weight is on the tow vehicle.
TBM - Tow Ball Mass: Also known as tow ball weight, tow ball load or tow ball download. The proportion of towing weights applied to towing vehicles. Amount of weight the fully loaded trailer imposes on the tow bar of the tow vehicle. *Aim 8% to 12% of the ATM.
Tare Mass or Tare Weight: The manufacturer's weight when leaving the factory, before any modifications, fluids or add ons.
GCM - Gross Combination Mass: Maximum fully loaded weight of towing vehicle and trailer / caravanwhen hitched together. Including all passengers.
Payload: A vehicle's is the maximum amount off weight it can carry safely.
FGAWR - Front Gross Axle Weight Rating: The total weight on the front axle as specified by the manufacturer.
RGAWR - Rear Gross Axle Weight Rating: The total weight on the rear axle as specified by the Manufacturer.