I have a couple people that should be going to the race, so I think we can work out some sort of pitting. I normally get to the race site around 8am.
I've been running the Sedona 907 @4-6 psi with Tubliss on my Husky wr250 for a while. It's been holding up in the Missouri rocks longer than any tire I've used so far. I don't think it would do as well as the AT81rc at pressures lower than 4 psi. My son is running AT81s front and rear on his yz450 at 3-5 psi and it's the best tire he has used yet and holding up well. I know I could run less pressure like 0-1 psi but I like the feel of having 3-6 psi when I hit rock ledges... I don't sweat bending a rim or breaking down the sidewall. I hoping Jeff at Tubliss will design a tire specifically for zero psi. I ran a motocross tire at zero and shredded the inside of the sidewall so I'm a little reluctant to run zero unless the sidewall is extremely tough.
The 880 is stiffer yet than the 907, I'd agree 5-6 psi in the 907 is the sweet spot! I took a 907 through 2 enduros and almost 40miles of road travel and its still in great shape! Hopefully this weekend I can get more testing on the 880!
I tried the 907 on a buddies bike, tube and 10 PSI, was not very good at all on NW leafy loamy stuff. I'll tell him about tubliss as it sounds like it is a lot better with real low PSI.
Yes, 5-6 psi on the 907 turns it into a very trials tire like feel. In my experience its a very good rock/root tire!
I agree with the trials tire comparison at 5-6 psi. The up side of the 907 compared with a MT43 is that the 907 is excellent in the sand and deep mud which makes since when you look at it, it's like a paddle tire but a bit offset to clear the mud.
I was able to do an enduro with the m59 b-stone front and the sedona mx880 rear a couple weeks ago. The day started with some rain making conditions pretty tackie at first. The tires worked well once again at first! As the day rolled on and the trail got beat in I seemed to be slipping and sliding everywhere and just thought it was due to the mud. I started with 1psi rear and 9psi front, when I finished I checked again and was at 4psi rear and 12 psi front!!! No wonder it felt slick! So the combo of warming temps and lots of road transfers put a lot of heat in the tires. Next time if the temps were stable I'd probably start off at the same pressures in hopes I would get to 10-11 from and 1.5-2 rear. This was not the best mud race set up but would handle mud sections just fine as it was predictable the rear spun more than an actual mud tire would of and the front packed up in the slower sections.
