When I started working for the Shilo museum back in March, I also had to deal with a number of low and flat tires. 90% of them were due to improper installation of the inner tubes. Things like no re-enforcing at the valve stems, valve off center tubes being used where valve on center tubes were required, and good old pinching of the inner tubes at the halves of the rims. I think I even had a nail in one of them.
I queried the local tire supplier about valve on center tubes and re-enforced flaps, but they could not help me. I brought up a fair batch from Wallace Wade at the last convention. The tire situation has become a lot more manageable now.
Foam filling is very expensive. We had it on a number of the all terrain forklifts when I was working overseas. Amazing the abuse they would endure, but the cost for static displays, or for vehicles that might put on 20 miles in a year, is hard to justify.
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