I found a flat when I started to pull out of a camp ground I installed a brand new spareAnd went on my marry way about 400 miles later I pulled into a campground and found the spare flat(an improperly installed valve stem) the spare still had the new tire tits on the wheel indicating that it had gone flat shortly after leaving the camp ground. I noticed nol differance in the way the trailer handled.I dont reccommend any one try this I had the spare repaired before leaving the campground.
Jim Smith
1965 Tradewind(The Silver Abaltross)