Cal78 -- Don't worry about asking questions that have been asked before -- we don't mind.
Just to echo 3B, though, might be helpful to know what truck (year, size, etc) you're referring to.
Once you determine what you're looking for, check around for good used tubeless Dayton wheels (rims) before you spend the big bucks on new ones.
For whatever it's worth, I went from tubed bias plys to tubeless radials (have to change rims, too) on my Dayton spoke truck ('72 9500). The improvement (ride, handling, etc) was remarkable. My sizes were 11.00R20 to 12R22.5, though.
