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#1
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Presta adapters
NE one heard of adapters if you use presta tubes. When I got my new GT MTB
they said I had to use adapters. They had none so now I have schrader again. What is the deal really. My old MTB took them but he said they can be damaged easily. Just your thoughs thanks. |
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#2
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Presta adapters
"nash" wrote in message news:RH51h.215104$1T2.191807@pd7urf2no... NE one heard of adapters if you use presta tubes. When I got my new GT MTB they said I had to use adapters. They had none so now I have schrader again. What is the deal really. My old MTB took them but he said they can be damaged easily. Just your thoughs thanks. I prefer Presta valves myself but here's a link that discuses a lot of the issues: http://www.sheldonbrown.com/brandt/presta-schrader.html Chas. |
#3
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Presta adapters
On Sun, 29 Oct 2006 17:40:01 +0000, nash wrote:
NE one heard of adapters if you use presta tubes. When I got my new GT MTB they said I had to use adapters. No, only if you want to fill up the tires at a gas station. Get a floor pump; they all work fine with presta valves. I've been riding 30 years, and I still don't have an adapter. again. What is the deal really. My old MTB took them but he said they can be damaged easily. They also hold air better at high pressure, and are easier to use. -- David L. Johnson __o | Enron's slogan: Respect, Communication, Integrity, and _`\(,_ | Excellence. (_)/ (_) | |
#4
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Presta adapters
On Sun, 29 Oct 2006 17:40:01 GMT, "nash"
wrote: NE one heard of adapters if you use presta tubes. When I got my new GT MTB they said I had to use adapters. They had none so now I have schrader again. What is the deal really. My old MTB took them but he said they can be damaged easily. Just your thoughs thanks. Some rims are so narrow that drilling them for Schrader valves leaves a weak spot; others need such a long valve stem due to aero designs that the only tubes made which will work with them are the long-stem Prestas. In such cases, the Presta valve has what is needed to solve a problem. If, however, the rim doesn't really need to be set up for a Presta valve, then the Scrader provides a more useful result, since it is much easier for the average rider to find a tire pump or inflation source (be it service station compressor hose or whatever) that is Scrader-accessible than one which works with Prestas. The adapter that you mentioned is a common way to overcome the lack-of-compatibility problem with Presta valves, but it has one drawback; the nut on the end of the Presta core can't be loosened or tightened with the adapter in place. (I think it's possible to make an additional tool which would do this, but I haven't tried to do so yet.) Since the most common way to store the adapter is on the valve stem, adding air to the tire on which the adapter is stored has two additional steps; the adapter has to be removed in order to loosen the nut before air can be added, and then it must be removed again in order to tighten the nut after the tire is inflated properly. With a Schrader valve, it's strictly pump-and-go. -- Typoes are a feature, not a bug. Some gardening required to reply via email. Words processed in a facility that contains nuts. |
#5
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Presta adapters
David L. Johnson wrote:
... No, only if you want to fill up the tires at a gas station. ... I tend not to do this and warn others not to as well. The problem with gas-station air hoses is that they get dropped on the ground a lot and get dirty, and then they blow that dirt into the valve seal when you use the air hose on your bicycle, and dirt in the seal will lead to slow leaks. You might not notice that with a car tire at 30 psi, or even a balloon-tire at 35 psi, but it can become obvious with a 1.3" wide bike tire that you want to keep at 100 PSI. They also hold air better at high pressure, .... I was not aware that this was any problem, at least as far as bicycles are concerned. There's heavy equipment and aircraft tires with inflation pressures of 100 to 200+ PSI and their schrader vales seem to hold up just fine. ~ |
#6
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Presta adapters
"nash" a écrit:
NE one heard of adapters if you use presta tubes. When I got my new GT MTB they said I had to use adapters. They had none so now I have schrader again. What is the deal really. My old MTB took them but he said they can be damaged easily. Are you talking about adapters to inflate a Presta valve with a Schrader chuck, or adapter grommets to use a Presta valve in a Schrader-drilled rim? James Thomson |
#7
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Presta adapters
"DougC" wrote in message ... David L. Johnson wrote: ... No, only if you want to fill up the tires at a gas station. ... I tend not to do this and warn others not to as well. The problem with gas-station air hoses is that they get dropped on the ground a lot and get dirty, and then they blow that dirt into the valve seal when you use the air hose on your bicycle, and dirt in the seal will lead to slow leaks. You might not notice that with a car tire at 30 psi, or even a balloon-tire at 35 psi, but it can become obvious with a 1.3" wide bike tire that you want to keep at 100 PSI. snip Another issue with air lines at gas stations, compressors create water condensate plus lubricating oil from the compressor can leak into the line. Both water and oil can get into your tires. Chas. |
#8
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Presta adapters
Are you talking about adapters to inflate a Presta valve with a Schrader
chuck, or adapter grommets to use a Presta valve in a Schrader-drilled rim? James Thomson Yes, that I am sure is what the LBS meant. Like I said it is a mtb and he told me not to use presta tubes. The screw goes down to the rim on the outside but he still said that does not cover it. I do not know why. |
#9
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Presta adapters
"* * Chas" wrote in message . .. "DougC" wrote in message ... David L. Johnson wrote: ... No, only if you want to fill up the tires at a gas station. ... I tend not to do this and warn others not to as well. The problem with gas-station air hoses is that they get dropped on the ground a lot and get dirty, and then they blow that dirt into the valve seal when you use the air hose on your bicycle, and dirt in the seal will lead to slow leaks. You might not notice that with a car tire at 30 psi, or even a balloon-tire at 35 psi, but it can become obvious with a 1.3" wide bike tire that you want to keep at 100 PSI. snip Another issue with air lines at gas stations, compressors create water condensate plus lubricating oil from the compressor can leak into the line. Both water and oil can get into your tires. Chas. I agree Chas and it is much smarter to carry your own repair kit and pump. No long walk to a gas station and finding out the pump does not work anyway. One summer every gas station in N.Surrey did not have a working pump. Gad! topeak has a smart head now so presta and shrader are automatic, no changing set up. Check pressure before you leave and you will not need a gas station. |
#10
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Presta adapters
On Mon, 30 Oct 2006 17:10:22 GMT, "nash"
wrote: Are you talking about adapters to inflate a Presta valve with a Schrader chuck, or adapter grommets to use a Presta valve in a Schrader-drilled rim? James Thomson Yes, that I am sure is what the LBS meant. Like I said it is a mtb and he told me not to use presta tubes. The screw goes down to the rim on the outside but he still said that does not cover it. I do not know why. Dear Nash, Your particular MTB rim has a slightly larger hole to suit the thicker Schrader car-style valve. The Schrader tube will work fine. If you want to use an inner tube with a thinner Presta valve to suit a Presta pump, you can buy a fitting from BikeToolsEtc to reduce the size of the valve hole in your rim: http://www.biketoolsetc.com/index.cg...tem_id=WB-PSS1 or http://tinyurl.com/y3v4oh Many hand pumps now come with dual or easily reversible chucks for both kinds of valves. Cheers, Carl Fogel |
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