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strange valve on single

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Old 21-03.-2007, 11:40 PM   #1
Campag
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Default strange valve on single

His guys, ive just picked up a new wheel aready with a single on it. The valve is a presta style valve stem but only has one or two shallow thread grooves. I have the adaptor peice to allow for a schrader pump but it wont thread onto this new valve stem. Any ideas????
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Old 22-03.-2007, 12:05 AM   #2
Scotty_Dog
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Default Re: strange valve on single

You have a tube with a threadless presta valve stem.

So you have 2 choices, buy a presta pump or buy a threaded presta tube.
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Old 22-03.-2007, 12:13 AM   #3
alfeng
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Default Re: strange valve on single

Quote:
Originally Posted by Campag
His guys, ive just picked up a new wheel aready with a single on it. The valve is a presta style valve stem but only has one or two shallow thread grooves. I have the adaptor peice to allow for a schrader pump but it wont thread onto this new valve stem. Any ideas????
Obvious choices include:
  • new tube (as noted)
  • new pump with a Presta connector (as noted; or, check to see if the pump's connector/head has a reversible, internal rubber "donut" which changes the pump from Schrader to Presta & back -- that's usually the case with all but the least expensive bicycle air pumps OR "automobile" air pumps)
  • buy a SILCA presta-specific/brass connector
  • enlarge the valve hole in the rim to accept a Schrader valve tube
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Old 26-03.-2007, 06:32 PM   #4
leestevens
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Default Re: strange valve on single

Quote:
Originally Posted by Campag
His guys, ive just picked up a new wheel aready with a single on it. The valve is a presta style valve stem but only has one or two shallow thread grooves. I have the adaptor peice to allow for a schrader pump but it wont thread onto this new valve stem. Any ideas????
Are you sure the valve unit is not missing? It sounds like the valve has been removed and the valve stem has been left there.
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