donn0128 wrote:
Why?
Axle ratings are for one single component of the entire package. The axle rating is placed on the single item by its manufacturer. The assembler of the vehicle then determines what the complete package can carry. Regardless of what an individual part can handle. There is also a difference between static and dynamic loading.
Generally speaking, the rest of the truck doesn't get lower-rated components.
For example, generally speaking the RAWR on a DRW 1-ton "Brand X" will be more than the RAWR of a SRW 3/4-ton. Let's assume both have the tow package with the same rear-gear ratio.
With the exception of dual rear wheels and tires, and an overload leaf, EVERYTHING on these trucks are the same. Same axle. Same brakes. Same everything.
The RAWR for the DRW truck is higher due to the weight the rear wheels/tires & overload leafs are designed to hold, and nothing else.
If I add an overload leaf (or airbags) to the SRW in the above example, and I'm below my wheel/tire rating, then I would absolutely have no issue towing with it.
