Sluggo54 wrote:
"The 225/75 R 15 tire of carlisle and Maxis ( and others like Goodyear) have exactly the same maxload at the same loadrange."
In the US, with few exceptions, the federal government specifies that all tires of a specific size and load rating (E, D, whatever) will have the same maximum load rating (3520, 2840, whatever).
That does not fully apply to ST tires, as some manufactures fumble those numbers.
Here are some examples. The advent of the 7K axle and large RV trailers was in play here!!!! The 80/3420 was the standard until there was pressure for cheap tires to cover a 7K axle. Goodyear is the only one that did not bend to that pressure.
Carlisle
ST235/80R16E inflation 85 lbs 3520
GY Maration
ST235/80R16E inflation 80 lbs 3420
Towmax
ST235/80R16E inflation 80 lbs 3520
Westlake
ST235/80R16E inflation 80 lbs 3520
Greenball
ST235/80R16E inflation 80 lbs 3500
Loadstar
ST235/80R16E Inflation 90 lbs 3500
Trailer King
ST235/80R16E Inflation 80 lbs 3520
Rainier
ST235/80R16E Inflation 80 lbs 3520
Grand Ride
ST235/80R16E Inflation 80 lbs 3520
Arison
ST235/80R16E Inflation 80 lbs 3520
Duro
ST235/80R16E inflation 85 lbs 3520