I have not tried them, but I did just put a set of SunF A051 Power II tires on my Pioneer 500 about two weeks ago and so far I LOVE them. Great tires, and I've already put a lot of miles on them. NOTE: I'm not pushing this, but if you DO end up getting SunF tires off the SunF.com website, you can use promo code "southwestorv" at checkout to save 5% on your overall purchase. If you end up putting those A021 tires on your P500 I'll be excited to see pics of them. You may be a "Pioneer" in trying out that tire.