|How to Calculate 5th Wheel Towing Capacity|
|Most Australian vehicles don’t have a specific “5th wheel towing capacity” rating. So how do you determine the size 5th wheeler you can tow?
Online 5th Wheel Towing Capacity Calculator
Quick and Easy
Gross Combination Mass – all vehicles have a rated GCM. This is the maximum total weight of the vehicle and its load, plus the trailer and its load.
You should also check that this weight does not exceed the vehicle’s other weight limitations such as towing capacity, gross vehicle mass, payload etc.
This example uses a 2005 Toyota Hilux SR5 Dual Cab V6 Petrol and a Venture 630 (21′) fifth wheeler.
Tare Mass (Trailer)
Note – this example uses the maximum possible load in the fifth wheeler..
Keep in mind, that just because your vehicle’s specifications allow you to tow a certain amount of weight, doesn’t mean that you should. More weight means more fuel cost, and less performance from your vehicle.
* note that the good carried in/on ute includes the weight of the hitch itself (the turntable that is fitted to the ute) and weighs approximately 85 kg.
Some of the definitions contained on this page have been sourced from the Caravan Clinic article in Caravan World November 2005, p125, by Tom Olthoff. Others have been modified specific to fifth wheelers.