Shouldn't be a problem, trailer tires are generally straight ribbed but can be used on the trucks back axle. You just won't have the traction as lug tires. Don't pass on a good deal just because they are trailer tires.
James
1957 Chevrolet 6400 flatbed dump In the Gallery Webshot pix 1942 Chevrolet 1 1/2 ton 1962 Chevrolet M80 tractor