Forum Discussion
wintersun
Aug 14, 2013Explorer II
"Payload" is a calculation done by the manufacturer based on the weakest link of the truck when it leaves the factory. It is almost always the tires which with a SRW truck usually have a combined load capacity of 6200 lbs. minus the weight of the truck itself. After the tires the limit is the weight that can be supported by the leaf springs. It is never the axle and its wheel bearings.
GM and Ford 3/4 ton trucks have AAM axles and wheel bearings rated at 10,900 lbs. while Ram/Dodge trucks have had axles and wheel bearings rated at 8,900 lbs. which subtracting 3,000 lbs. of truck weight leaves a very hefty "payload".
A 1-ton with DRW has a higher payload rating not because of any difference in the engine and drivetrain and suspension over a SRW version, only the extra two tires to support the gross weight. Four 2,200 lb. tires will support 1300 more pounds at the rear axle than two 3750 rated tires and a DRW setup is the easiest way to maximize the payload capacity of a pickup truck.
With the factory rims on my 2500HD truck the maximum payload is limited by the 7500 lb. load capacity of my two rear tires. That leaves a maximum wet camper weight of 4300 lbs. using the factory rims. I could gain a little more payload capacity with 19.5" rims and tires but not enough to make it worth the expense involved.
GM and Ford 3/4 ton trucks have AAM axles and wheel bearings rated at 10,900 lbs. while Ram/Dodge trucks have had axles and wheel bearings rated at 8,900 lbs. which subtracting 3,000 lbs. of truck weight leaves a very hefty "payload".
A 1-ton with DRW has a higher payload rating not because of any difference in the engine and drivetrain and suspension over a SRW version, only the extra two tires to support the gross weight. Four 2,200 lb. tires will support 1300 more pounds at the rear axle than two 3750 rated tires and a DRW setup is the easiest way to maximize the payload capacity of a pickup truck.
With the factory rims on my 2500HD truck the maximum payload is limited by the 7500 lb. load capacity of my two rear tires. That leaves a maximum wet camper weight of 4300 lbs. using the factory rims. I could gain a little more payload capacity with 19.5" rims and tires but not enough to make it worth the expense involved.
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