The maximum legal weight of your tow vehicle when loaded. This includes the tow ball weight when a caravan/trailer is attached.

The maximum legal weight your vehicle and caravan/trailer can weigh when hitched together and fully loaded.

GCM = GVM + GTM

The maximum legal weight that can be transferred by the caravan/trailer onto the vehicle’s tow ball.

The maximum weight allowed on each axle. This limit is specified by the vehicle manufacturer and must not be exceeded.

How much weight is being applied to an axle.

The maximum mass your vehicle can tow if your trailer has its own brakes. This limit is specified by the vehicle manufacturer and must not be exceeded.

The maximum legal weight of your fully loaded caravan/trailer when unhitched from your tow vehicle.

ATM = GTM + TBM

The maximum legal weight of your loaded caravan/trailer whilst hitched to your vehicle.
GTM = ATM - TBM

The amount of weight being transferred by the caravan/trailer onto the vehicle’s tow ball.

Whilst all tow vehicles will specify this limit, not all caravan/trailer compliance plates have this limit listed. If your caravan/trailer compliance plate specifies this limit it must be complied with.

This is not the same at Tow Ball Mass at Tare.

The maximum weight allowed on the axle(s). This limit is specified by the caravan/trailer manufacturer and must not be exceeded.