What determines a vehicle's towing capabilities?

[Pado]

Is this determined from the power that the truck has, so if you add more power, the more you can tow? Or is that relating to the suspension on the truck. So again, if you have beef up your suspension, can you have a higher towing weight rating?

 

[Crawler80]

Rear suspension geometry, spring rates, brakes, power and wheelbase. By upgrading all of the above you can inporve the towing behaviour of your truck

 

[Sam Mills]

Rear suspension geometry, spring rates, brakes, power and wheelbase. By upgrading all of the above you can inporve the towing behaviour of your truck

Correct