My XLH sat for almost a month in my garage over the holidays. It actually got down into the 30's, so it was cold while we were gone.
When I got back my rear tire was almost flat. I have my own compressor, so put it back to 40 psig this AM and it's been there all day. I'll keep watching.
I inspected for nails, cuts, valve leakage, etc., but the tire still looks brand new. I think it was new when I bought it, so suspect it may not have been properly seated? (I bought this from a widow. Her husband passed away after doing all sorts of neat things including putting on new tires, and I don't think it ever got ridden very much after that).
If it continues as a slow leak, the cause of which cannot be definitly identified, are there any caveats to adding some of that stuff sold in cans to seal leaks? (i.e - will it cause the tire to "glue" to the rim hindering future removal)?
I don't want to Mickey Mouse this situation, but I really can't identify the source of the leak. What if I over-presure the tire to maybe 50 psi and haul ass down the freeway at 100 MPH? Will that seat the tire? (Sort of joking on that, but sorta 1/2 serious too)!
Oh yes, this is a tubless tire on a cast rim.
Thanks in advance for any relevant input! | 
