Tech Tip – Definitions
Posted: 27th June 2017
Posted in: Tech Tips
GVM (GROSS VEHICLE MASS)
The GVM is the maximum allowable total mass of a fully loaded motor vehicle, consisting of the tare mass (mass of the vehicle) plus the load (including passengers).
ATM (AGGREGATE TRAILER MASS)
The total laden weight of a trailer, which includes the tow ball mass and whatever you add as payload (eg. Water, gas, luggage). The ATM is specific by the trailer manufacturer and must not be exceeded.
GTM (GROSS TRAILER MASS)
The total permissible mass which includes whatever you add as payload (eg. 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.
The unladen weight of the complete new trailer as delivered (including any options fitted).TOW BALL MASSThe weight imposed on the tow vehicle’s tow ball by the coupling.PAYLOADThe 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.