I have used LT215/85R16 (black walls) on my 6.50x16" 4.5" rims/wheels, with and without inner tubes.
These tires have the general appearance of the original bias ply tires.

Hopefully, someone with 6.00x16" 4.0 rims/wheels on any 47-55st 3100 will post their size of radial tires.