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# What can overloading a vehicle cause?

Overloading a vehicle can put a huge strain on the engine, transmission and other working parts. At the same time, drivers in overloaded vehicles are putting themselves and others on the road at risk. <a href="http://auto.howstuffworks.com/auto-parts/towing/towing-capacity/vehicle/payload.htm">How Payload Works</a>

# What do you need to know to calculate a vehicle's payload?

To calculate your vehicle's payload capacity, you only need to know two things: your vehicle's gross vehicle weight rating (GVWR) and its curb weight. <a href="http://auto.howstuffworks.com/auto-parts/towing/towing-capacity/vehicle/payload.htm">How Payload Works</a>

# What is GVWR?

Gross vehicle weight rating is simply the maximum allowable weight of an entire vehicle when it's packed up and ready to go -- that includes the weight of the vehicle itself, all of the necessary fluids for operation (gasoline, diesel, oil and so on) and any cargo, passengers and tools. <a href="http://auto.howstuffworks.com/auto-parts/towing/towing-capacity/vehicle/payload.htm">How Payload Works</a>

# What is curb weight?

Curb weight is simply how much the vehicle weighs on its own, without any cargo or passengers. <a href="http://auto.howstuffworks.com/auto-parts/towing/towing-capacity/vehicle/payload.htm">How Payload Works</a>

# What is the formula for calculating payload?

Gross vehicle weight rating - curb weight = payload capacity <a href="http://auto.howstuffworks.com/auto-parts/towing/towing-capacity/vehicle/payload.htm">How Payload Works</a>

# Which of the following has a heavier payload?

Your truck's payload is going to be much heavier than other types of vehicles, so knowing how the truck is classified will help you determine what amount is safe. <a href="http://auto.howstuffworks.com/auto-parts/towing/towing-capacity/vehicle/payload.htm">How Payload Works</a>

# How are truck classified in the United States?

Trucks in the United States are classified according to their maximum gross vehicle weight rating. <a href="http://auto.howstuffworks.com/auto-parts/towing/towing-capacity/vehicle/payload.htm">How Payload Works</a>

# How many different classes of trucks are there in the United States?

There are actually two ways we can look at this: by class or by category, although both are related to each other. Weight classes, determined by the U.S. government, divide maximum truck GVWR into eight classes. <a href="http://auto.howstuffworks.com/auto-parts/towing/towing-capacity/vehicle/payload.htm">How Payload Works</a>