Forum Discussion
Walaby
Jan 17, 2019Explorer II
It's my understanding (albeit I could be wrong) that J2807 is a testing standard that tests towing capacity and GCWR. I do not believe it replaces the calculated payload, but the test ensures the test vehicles are loaded to payload capacity.
"In a nutshell, SAE J2807 requires the vehicle manufacturer to use a vehicle equipped with the popular options found on at least 33 percent of the vehicles sold for that model; they also must run the test procedures with the equivalent of a 150-pound driver and passenger. The truck is hitched in a specific manner to a trailer that meets SAE specs and puts the tow vehicle (the pickup truck) at its maximum gross combined weight rating, meaning the combined weight of the pickup, its maximum payload, full fuel tank and the weight of the trailer."
Now, I agree in the total calculation to test to the standard, it takes into consideration the items you mention, but I do NOT believe the payload calculation assumes 300 lbs for passenger/driver and the hitch. In fact the payload sticker clearly states combined weight of all occupants and cargo should not exceed "x"
I may be a tad agressive on the 14% TW calculation, but I also made an assumption that TT is midway between dry and GVWR. May or may not be a valid estimate.
That being said, Im not one to quibble. It's worth knowing your weights and how they affect your setup. At least then you can make informed decisions on how to adjust accordingly.
Mike
"In a nutshell, SAE J2807 requires the vehicle manufacturer to use a vehicle equipped with the popular options found on at least 33 percent of the vehicles sold for that model; they also must run the test procedures with the equivalent of a 150-pound driver and passenger. The truck is hitched in a specific manner to a trailer that meets SAE specs and puts the tow vehicle (the pickup truck) at its maximum gross combined weight rating, meaning the combined weight of the pickup, its maximum payload, full fuel tank and the weight of the trailer."
Now, I agree in the total calculation to test to the standard, it takes into consideration the items you mention, but I do NOT believe the payload calculation assumes 300 lbs for passenger/driver and the hitch. In fact the payload sticker clearly states combined weight of all occupants and cargo should not exceed "x"
I may be a tad agressive on the 14% TW calculation, but I also made an assumption that TT is midway between dry and GVWR. May or may not be a valid estimate.
That being said, Im not one to quibble. It's worth knowing your weights and how they affect your setup. At least then you can make informed decisions on how to adjust accordingly.
Mike
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