All the above postings contain good advice and links to good information.
My radials are Cooper LT215/85R16 that are supposed to fit a 5.5 (and a little larger) rim. My rims are 4.5, so I have been careful to inspect the wheels regularly.
The 215-85 is a relatively tall and narrow tire and this puts less stress on the rims than do wider/lower radials. It should also be noted that LT-designated tires are supposedly higher "ply rated" than passenger style tires
My high speed is about 65 mph (3.55 rear end) and speeds above 50 mph would only be on an Interstate Highway (lower speed turning, most of the time). My trucks never run fully loaded. Better safe and pre-warned than sorry.
Tim
