Towbar
GVM(Gross Vehicle Mass) The GVM is the maximum allowable total mass of a fully loaded motor vehicle as specified by the manufacturer.Consisting of the tare mass (unladen mass of the vehicle) plus the load.The load would include fuel, all occupants, cargo and any add-on accessories.Note: Vehicle such as utilities, may not include the weight of the tray body or spare wheel. Check with your manufacturer.
Payload
All the extra bits on board including water, gas, cargo, clothes, accesories and add-ons. We used guide of 300kg as a payload, but this will depend on make and model. Payload is the ATM minus the Tare Wight.Tow Ball WeightTow ball weight (ball load or tow ball load) is the load exerted on the tow ball of the tow vehicle. In Australia, ball weigh is generally around 10% of the ATM.Check your RV specs.Note: this weight is included in your tow vehicle's payload
Tare(Tare Mass) Base weight at manufacture. Unhitched from the tow vehicle.Weight of your caravan empty. No Payload including tank water,gas in bottles of after amrket accessories.
ATM(Aggregate Trailer Mass)Weight of your caravan fully loaded when it is unhitched from the tow ehicle. This rating is set by the manufacturer and cannot be exceeded, that is the maximum allowed.
GTM(Gross Trailer Mass)Weight of your caravan fully loaded when it is hitched to your tow vehicle.
Tow Ball Weight
Tow ball weight (ball load or tow ball load) is the load exerted on the tow ball of the tow vehicle. In Australia, ball weigh is generally around 10% of the ATM.Check your RV specs.Note: this weight is included in your tow vehicle's payload
GCM
(Gross Combined Mass)
Weight of your tow vehicle and caravan, hitched together with both fully loaded