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Old 12-07-2015, 08:52 PM   #1
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Mystery Tube

What the heck is it?

Thanks, Keith
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Old 12-07-2015, 09:00 PM   #2
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Just a wild guess but it looks like an air fill. We used them on the duels in the old days to reduce or add air from the cab. Never saw one on a motorhome.
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Old 12-07-2015, 09:14 PM   #3
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Yep, air fill. Can add air as you drive to keep a tire inflated that's going down. Think it's automatic too.
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Old 12-07-2015, 09:54 PM   #4
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I saw these on the Volvo buses when we were in Mexico a month ago. I also wondered what they were. Thanks for posting
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Old 12-07-2015, 10:10 PM   #5
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IIRC, the name is Geoset, pronounced Geo Say. In the cab there is a panel that continuously monitors the air pressure in tires. If more is needed such as in having a flat, the compressor adds more to the tire. The panel even has a pressure gauge for each tire. Pretty slick.

A few years back, there was a guy selling the system at the Indio FMCA rally, haven't seen him in awhile.

The systems are required on long haul buses in Mexico
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Old 12-07-2015, 10:21 PM   #6
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There was an article about them in one of the RV mags (FMCA?) think it was about $8,000 but that's going from memory.
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Old 12-07-2015, 10:39 PM   #7
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Interesting. Thanks for the answers. I guess there is enough flexibility in the elbows to permit full wheel cut on the fronts?

Keith
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