Helpful Information About Weights

GVM: Cross Vehicle Mass

The GVM is the maximum allowable total mass of the fully loaded motor vehicle, consisting of the tare mass (mass of the vehicle) plus the road (including the passengers).

GCM: Gross Combination Mass

The total laden weight of a trailer, which includes the tow ball mass and whatever you add as pay load (e.g. water, gas, luggage). The ATM is specified by the trailer manufacturer and must not be exceeded.

ATM: Aggregate Trailer Mass

The total laden weight of a trailer, which includes the tow ball mass and whatever you add as pay load (e.g. water, gas, luggage). The ATM is specified by the trailer manufacturer and must not be exceeded.

GTM: Gross Trailer Mass

The total permissible mass which includes whatever you add as payload (e.g. water, gas and luggage) that can be supported by the wheels of a trailer. This does not include the mass supported by the tow ball.

Payload

The allowable load carrying capacity or ‘payload’ is worked out by deducting the “Tare Mass” from the “ATM”. It must not be exceeded under any circumstances. Safety, insurance & warranty may be affected if the specified payload is exceeded.

Tare Mass

The unladen weight of the complete new trailer as delivered (including any options fitted).