I am going to haul a load on a trailer that hasnt been used for a while. It has one tire i got that was brand new but had sat on the rack a long time. It was low and looked like it was separating. I am going a little over 30 miles today i thought last night i would put on the spare it was low. I aired it up and put it on it has a slow leak. Because of every thing i have a small window of how long i can be gone and it will add a hour to go out of the way or i would have another tire mounted up and fix the spare. On the way back i will get a tire mounted so maybe i will be in better shape next time.