I've ran both, radials and bias. Radials I got about 30-40K miles out of them. The bias I haven't ran out yet. The radials seemed to hook up better on the rocks than I have seen out of the bias tires. HOWEVER! With the bias tires, I do notice a difference between 15 and 10 psi. This past weekend I ran them down to 7 and noticed even more of a difference.
I've been afraid to run them too low with no bead locks. I have blown one bead at 10 psi. This weekend I never even burped any air. I think they would be even better down around 4-5 psi, which is where a bias tire should be.
So far on this set I have about 10k miles on them an dthey still look pretty new.
With that said, I doubt I will run anything else on my road driven trail rig. If it was a trailer queen, then I'd probably have Maxxis or ? instead. You know, one of those tires that are real sticky but only good for 5k miles.