It looks like a take off on the Dodgen Industries "Born Free" (BF-20) units of the 1970's which were made in Humboldt, IA. However they had much smaller tires and wheels than the one shown by the OP. From the photos that I have seen, there were some springs on the axles that looked like they kept the tires straight but allowed for turns.
I have been looking for information on the rear axle and suspension for an idea that I have had for quite a few years. But with other things, I put it away, until about 3 months ago when they started pipping up on the net. Only recently have I really started to do some research, with not to much luck.
"Doc"
Combat Vietnam VeteranSupport our troops for serving our great country.
CLass "A"='90, SunBus, Oshkosh, 460, C6, 5.12 gears, 8R19.5.
New TV='02, K3500, CC, DRW, 8.1L, Allison, 4.1 gears.
Pace 8518TA2 Trailer. Looking for a side entry T/C with no slides.
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