I'm so glad I found this thread and didn't have to make a new one on tire pressures. I looked over the post but can't find anything on recommended pressures which I know has been covered before. I believe the correct tire pressure is calculated on axle weight. I remember weighing my bus before and recall that it was pretty near close to 15,000 lbs per axle but I can't find the paper I used to calculate the pressure and this is the first real road trip we've been on in over 3 years. I've been using 100 lbs for the last 7,000 miles but yesterday after driving in cool climate at only 55 MPH the tags were noticeably warmer to the touch but not so warm that I could say it was dangerous. I want to pick up a laser temperature gauge immediately and use that to check for temperature variances on the tires. I backed the tags off to 90 psi after a fellow bus owner said that a Prevost tech had recommended 100 in the drives, 100 in the front, and 90 in the tag. But when I phoned him today he suggested putting more air in the tags and checking the temperature again.

Related, if the tire pressures are different in the tags and drives, I think the level low will adjust the weight automatically such that the load distribution is unchanged as compared to how the weigh would be distributed with 100, 110 or 80. Is that correct ? The reason I THINK that is correct is that I believe if you pull the tag that the bus will droop but also begin to boost up the drives and level itself out again. If I'm going slowly in a turn lane and see that a driveway could make the belly rub, I usually pull the tag to make the turn and also begin to boost both sides up toggling back and forth between left and right. But if time is of the essence and the height is a priority then should probably leave the tag put and raise the coach for a faster raising of the ride height. Further, my tag tires are ready for replacement. I am really in the habit of pulling the tag in all tight turns and when backing up and turning sharp also but they seem to take more than their fair share of premature wear. Or it could be that when I put new tires a few years ago that I rotated the best out of 8 tires to the tags and replaced the other 6 and am not recalling the tread life that was on them. I need to keep better notes.