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Old 09-16-08, 08:44 AM   #1
cyqlist
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Tubes with bent schrader valve stems for small wheels with big hubs

Does anyone know of a good source for these? They seem to be very hard to find in an internet search.

Here's the 12" front wheel of my Mobiky with one:


And an example of a 16" wheel that might need one - I can't see the valve in this picture. Someone in the electric bikes forum is also looking for them in the 16" size.

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Old 09-16-08, 09:13 AM   #2
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Check this site for 12.5" tubes.
http://www.1800wheelchair.com/asp/vi...ategory_id=738
Check your Mobiky's tube for exact dimensions.

You can get the 16" tubes from thorusa. He sells both presta and schrader valve style.
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Old 09-16-08, 09:26 AM   #3
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Quote:
Originally Posted by Joako View Post
Check this site for 12.5" tubes.
http://www.1800wheelchair.com/asp/vi...ategory_id=738
Check your Mobiky's tube for exact dimensions.

You can get the 16" tubes from thorusa. He sells both presta and schrader valve style.
when I had to replace the 12" tube on my Frog, I couldn't find any local sellers for wheelchair tubes and ended up buying a 90 degree valve adaptor. It has come in handy for also pumping my 18" birdy wheel that has a hub motor
http://cgi.ebay.ca/ws/eBayISAPI.dll?...B:EOIBSA:CA:11
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Old 09-16-08, 12:09 PM   #4
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Yes, the Mobiky size is 12 x 2 (ISO 203mm). I think of them as 12" because that is their actual rolling diameter.

Thanks for the link to 1800wheelchair.com. They even have a choice of a 45 or 90 bend in the stem on the 12.5" tubes. I am guessing that in this case 12.5 is the same as 12 though that is not a good general rule. But no 16" tubes.

I do not see any tubes with bent valve stems on the Thorusa site.
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