I am trying to confirm this but I thought that the Sailun S637's and the Goodyear 614's were both rated for 75 MPH which I think would be a speed rating of L. As for light truck verse trailer I do not have all the answers. In 8 k LB axles with 16" wheels what all tires are available? In 7K LB axles with the 16" wheels I had trouble getting high weight rating for my truck with semi narrow stock rims. In my opinion the two models of tires that I mentioned above would probably be my choice for my rim size over all other tires including LT tires. These are H rated tires around 4000 lbs capacity and weight sixty some pounds apiece.
Tom Marty
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