Carlyle, I'm fascinated by your 19.5 vs. 20 MPT81 experience, as I'm trying to decide what to put on my 08 Ram 3500 dually as I do an SRW conversion for an XP Camper.
I have a thread going over here w/ a discussion about the pros & cons of each
http://forum.xpcamper.org/index.php/topic/34-turn-key-rigs/?p=1127 . You seem to be one of the few that's really experienced both, so I'd love to know what you think. Specifically:
1) I hate road noise; for whatever reason it just drives me crazy. I'm considering a Toyo M608z on a 19.5" Rickson. I know you didn't run the Toyo specifically, but I was wondering, how was the road noise on the 19.5s vs. the 20s?
2) I'm planning on doing 95% road driving & just want to be able to get to a deserted beach or campsite now & then. It sounded, from your experience, that the biggest problem with the 19.5s wasn't the traction per-se (i.e., getting stuck) but rather the uncomfort of the high PSIs you had to run while offroad. Is that accurate? I assume the MPT81s are much better in this regard. Is it still worth the trade-off for you?
3) How's the wear been on your new set of MPT81s?
4) The 68mph K speed rating of the MPT81s really concerns me... thoughts on that?
5) The MPT81s are *huge* compared to your older 19.5s!!! Do you like the larger size? Does it matter?
6) Any opinions on what width I should go with? I don't mind skinny tires so I'm not worried about looks.
7) Since I'll be mostly on-road, I'd like to maximize MPGs and I'm assuming the 19.5s provide better MPGs than the 20s, although it seemed you weren't certain. Do you have any better idea now that you've run the 20s for a while how MPGs compare?
8) If you were in my position having to choose, which would you go with now that you've done both?