Hey Mark,
Would this be the culprit to loose pressure at cetrain times. Also, do you have any idea of what valve to get? Also, I have given up on the tire issue as from what I have read there is not much I can do. I have talked to others who have said when the tire folds like mine it is because it is stiff, cold and new. Hence, why running more air prevents the folding and pulling off the rim. I bought an expensive set of trailready/swamper fake beadlocks.