I am still testing on the pressure. I have made passes from 21lbs up to 34lbs. It seems like the higher pressure works better for some reason. One night session the track wasn't that good and I lowered down the pressure and traction was worse from my first pass that night. It's completely opposite from normal slicks. The big ballon tires run like 8lbs. The only thing that concerns me is you can see that not all the tread is hitting the track. Maybe like an inch on each side doesn't have wear marks. I'll have to flatten them out and see how low they will have to be to hit. My concern is the big tires usually have bead locks on the rims to keep them from spinning and coming off the rim. We don't and I don't want to risk ruining the tire or worst from too low of pressure. So I'm awaiting curiously. If you call again, be sure to let me know.
Thanks,
Cruzinquick