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ITOW > Truck Spec Calculator


 

ITOW Truck Spec Calculator

Spec A New Truck

Spec A Used Truck

You know you want to haul bigger loads, but to do so you have to determine several factors. Do I need extra weight on the front end or a longer wheelbase? Which one is the right decision depends on the application, and to determine how much additional weight you can carry with either of these modifications, use the following calculator.

This calculator abides by the SAE J2512 recommended practice of keeping 50% of the front axle weight on the ground.

If you were buying a new truck, you could simply select the rear axle that would carry your desired load. However, if you are looking to buy a used truck, these specs have already been chosen. To calculate the lifting load of a truck in which you know the capacity of the rear axle, use the following calculator.

Fill-in this information

Front Axle Weight = (Actual weight on front axle)
Rear Axle Weight
=
(Actual weight on rear axle)
Wheelbase
=
(From axle to axle*)
Overhang
=
(From axle to point of lift*)

Fill-in this information

Rear Axle Weight (Actual weight on rear axle)
Rear Axle Rating
=
(Axles maximum load rating)
Wheelbase
=
(From axle to axle*)
Overhang
=
(From axle to point of lift*)


* On tandem axle trucks the cab-to-axle and overhang measurements are made from the center of the tandems.

These values are calculated

Maximum Lifting Load = (How much you can lift)
Rear axle Load (laden)
=
(Minimum rear axle size)

This value is calculated

Maximum Lifting Load =
(How much you can lift before exceeding your rear axle rating)