Thanks mate. They're for an early Toyota Kluger...yeah I know but don't laugh there's a point to all this.
All wheels have a minimum load capacities. They're usually (but not always) stamped on the wheel or otherwise available from the manufacturer. There's also a basic calculation on the minimum for each car. Roughly the maximum of all weights (car, fuel, number of passengers, boot capacity, roof rack capacity, as well as max tow ball weight) divided by 4. Another calculation is 50% of the maximum rated axle load more useful for cars or utes carrying heavy loads.
For the V35 is about 450kg per wheel. For my Kluger it's 565kg. These are the minimum and load capacities are always much higher to take into account bad roads, potholes, kerbs, etc. The wheels I have at the moment are rated to 1200kg and weigh 15kg which is why I want lighter ones. I have a set of Lenso's off a Skyline rated at 690kg and weighing about 9.5kg but prefer the V35 wheels.
I expect the OEM 18" V35 wheel loading is between 750kg and 950kg but want to be sure.