I have the 12 bolt radial wheels so i run the rubber runflat that came with my wheels, mainly because they came with the wheel. I still do a lot of daily driving in the thing so its nice to know that if i pick up a nail i'll come down on the runflat instead of the wheel, but they are heavy and at 10psi and under on the trail i think i've bounced of the runflats a couple times, which didn't help the situation i was in at the time.