Dubro inflatable wheels. What pump??
#26
Success
[HR][/HR] I managed to get them to inflate. I pumped them both up a bit, 6.5", then released the air until they were 6.25". I will keep an eye on them. I used the wooden vise in my Sjobergs woodworkers bench to set the exact diameter and then just set them in to determine the exact size releasing just the right amount of air until they just fit in the vise. You need a separate detached filler valve to do this accurately. These tires have a nice cushion to them, they are much better than the stock 4" tires that came with my Miss Morava tow plane. I can see how it is important to keep an eye on the diameter of these tires as temperature and barometric pressure changes can possibly allow them to over inflate. A separate fill valve should be with you at the field to let out some pressure if they start to over expand from a hot day. I am quite pleased with these tires.
[HR][/HR] I managed to get them to inflate. I pumped them both up a bit, 6.5", then released the air until they were 6.25". I will keep an eye on them. I used the wooden vise in my Sjobergs woodworkers bench to set the exact diameter and then just set them in to determine the exact size releasing just the right amount of air until they just fit in the vise. You need a separate detached filler valve to do this accurately. These tires have a nice cushion to them, they are much better than the stock 4" tires that came with my Miss Morava tow plane. I can see how it is important to keep an eye on the diameter of these tires as temperature and barometric pressure changes can possibly allow them to over inflate. A separate fill valve should be with you at the field to let out some pressure if they start to over expand from a hot day. I am quite pleased with these tires.
You are assuming that these tires will hold air. I've seen several sets that leaked.
#28
Join Date: Jun 2014
Location: Hudson Valley. New York. USA
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Du Bro's video about using a sports hand pump, fuel line, and the brass adapter thingy to pump up the tires:
https://www.youtube.com/watch?v=HBJggnDc9N4#t=33
https://www.youtube.com/watch?v=HBJggnDc9N4#t=33
#29
Du Bro's video about using a sports hand pump, fuel line, and the brass adapter thingy to pump up the tires:
https://www.youtube.com/watch?v=HBJggnDc9N4#t=33
https://www.youtube.com/watch?v=HBJggnDc9N4#t=33
#30
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I can;t get my air valve to open. It screws in fine then stops and I can still squeeze the tire and no air comes out like they show in a DuBro video on pumping them up. I suspect I am doing something wrong but can;t figure out what it would be. I can;t get the inflater piece to screw into the tire valve any further without grabbing it with a pliers or something and doubt that is a good idea.
#31
I can;t get my air valve to open. It screws in fine then stops and I can still squeeze the tire and no air comes out like they show in a DuBro video on pumping them up. I suspect I am doing something wrong but can;t figure out what it would be. I can;t get the inflater piece to screw into the tire valve any further without grabbing it with a pliers or something and doubt that is a good idea.
#32
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#34
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#36
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The filler valve screws in easily until it stops with he flange a little off of the tire valve. From there it does not feel lke it can turn anymore without a pliers or something. I do not have it attached to a pump yet. I saw a DuBro video where he screwed the filler fitting into the tire an then squeezed the tire to see that air came out. I have been trying to do that with no luck.
#38
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On both wheels its the same thing, screws in easily till there is maybe 1/8" gap between the flange on the inflator fitting and the air valve in the tire. The threads on the inflator fitting look good under magnafication, not rolled or crossed or anything.
#39
They must be defective, call Dubro and ask for Jim. http://shop.dubro.com/c/aircraft_pus...on=recommended
#41
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I told them this is part of why I have been buying DuBro stuff for over 40 years!
#46
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Got the new inflator fitting from DuBro and the wheels work perfectly with no force, grunting or groaning. Of curse I also got email that assures me all of the DuBro wheels are like that and none of them work. That must mean that the ones I got are the defective ones because they work fine. - or something like that.
#48
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I have doctors telling me that in a couple years or so I won't be working anymore. I can deal with a low tire if it comes to that. I bought a pump, I fear no low tires!
#50
I've purchased a 5.5" and a 4" set of Dubro inflatable tires, and both are very heavy for their size. Would be useful to move the CG forward for short nosed airplanes like a Stearman.
The brass inflator tool is MUCH smaller than I was expecting. It IS in the bag of accessories packaged with the wheels.
Chris
The brass inflator tool is MUCH smaller than I was expecting. It IS in the bag of accessories packaged with the wheels.
Chris
Last edited by cjshaker; 08-01-2024 at 09:30 AM.