Presta valve
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Lots of people, the vast majority, maybe, in the bicycle industry appear to have no issues with Presta valves.
The problem might not be with Presta valves.
#78
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well, strange as it seems years ago bicycles came with Dunlop valves and ridiculous frame hand pumps with rubber hose attachments that quickly leaked and made pumping up tyres a chore. A shop style floor pump wasn’t even available in this country(aus) so people who road bikes for transport would go with the Schraeder tubes so they could easily inflate them at gas stations
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well, strange as it seems years ago bicycles came with Dunlop valves and ridiculous frame hand pumps with rubber hose attachments that quickly leaked and made pumping up tyres a chore. A shop style floor pump wasn’t even available in this country(aus) so people who road bikes for transport would go with the Schraeder tubes so they could easily inflate them at gas stations
Most people here are carrying (should be carrying) something to inflate their tires. And they are likey riding for recreation or exercise.
The "bikes for transport" likely typically had wide tires and were often ridden with under-inflated tires.
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Because I'm a curious character, I just measured the cracking force of a schrader valve to be about 13 ounces, and the valve seat diameter to be about 0.08 inches. It would take about 160 PSI to blow it open with pressure from the pump. So there's a little nub in the pump head that pushes the pin when you attach the head.
Last edited by Gresp15C; 03-23-21 at 05:04 PM.
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#84
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Okay, perhaps you have learnt something or not, before you jump in with your criticism next time, look at the big picture of how people use bikes......everywhere. Many people here( it is the www) preferred the schraeder simply because it offers them the convenience of using gas station air( of course we are not talking about serious Tour de France wannabes) but this forum isnt just for those is it?
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with the warm season here, it'll deflate rather quickly like a snapped off presta pintle.
With a presta valve setup & no pump, you could stow two 12g cartridges that will "blow" past the valve. Should net you 90 psi in the tube.
With a presta valve setup & no pump, you could stow two 12g cartridges that will "blow" past the valve. Should net you 90 psi in the tube.
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The pump head pushes on the little pin, and holds the valve open during inflation.
Because I'm a curious character, I just measured the cracking force of a Presta valve to be about 13 ounces, and the valve seat diameter to be about 0.08 inches. It would take about 160 PSI to blow it open with pressure from the pump. So there's a little nub in the pump head that pushes the pin when you attach the head.
Because I'm a curious character, I just measured the cracking force of a Presta valve to be about 13 ounces, and the valve seat diameter to be about 0.08 inches. It would take about 160 PSI to blow it open with pressure from the pump. So there's a little nub in the pump head that pushes the pin when you attach the head.
Also, I can report that there was a brief fad among the fellow racers in my home town, back in the mid-1960s, of snapping off the exposed portion of the inner core of the Presta valves of their latex-tubed tubular tires. Why, you ask? So that they wouldn't have to keep unscrewing and rescrewing the knurled tip for the daily task of reinflating the tires.
And also, and probably more importantly, come to think of it, they did it to avoid the common spectacle of the handle of a Silca hand pump launching a good 50 or 60 feet in the air after inadvertently nudging the knurled tip of the valve, instantly blasting all the tire pressure into the pump.
That fad lasted until the first time one of them had a flat and the valve core disappeared irretrievably into the tire's innards.
Last edited by Trakhak; 03-23-21 at 03:14 PM.
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If that's the case, why do I often have to "burp" the Presta valve after my first attempt at inflation with a floor pump fails? The gauge shows that air in the hose reached some astronomical pressure, and yet the valve refuses to open, nub or no nub.
Also, I can report that there was a brief fad among the fellow racers in my home town, back in the mid-1960s, of snapping off the exposed portion of the inner core of the Presta valves of their latex-tubed tubular tires. Why, you ask? So that they wouldn't have to keep unscrewing and rescrewing the knurled tip for the daily task of reinflating the tires.
And also, and probably more importantly, come to think of it, they did it to avoid the common spectacle of the handle of a Silca hand pump launching a good 50 or 60 feet in the air after inadvertently nudging the knurled tip of the valve, instantly blasting all the tire pressure into the pump.
That fad lasted until the first time one of them had a flat and the valve core disappeared irretrievably into the tire's innards.
Also, I can report that there was a brief fad among the fellow racers in my home town, back in the mid-1960s, of snapping off the exposed portion of the inner core of the Presta valves of their latex-tubed tubular tires. Why, you ask? So that they wouldn't have to keep unscrewing and rescrewing the knurled tip for the daily task of reinflating the tires.
And also, and probably more importantly, come to think of it, they did it to avoid the common spectacle of the handle of a Silca hand pump launching a good 50 or 60 feet in the air after inadvertently nudging the knurled tip of the valve, instantly blasting all the tire pressure into the pump.
That fad lasted until the first time one of them had a flat and the valve core disappeared irretrievably into the tire's innards.
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After this thread finally expires around December 2021, another thread will be started about: "valve stem caps vs no valve stem caps".
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November 2021 -
- - General --
"Are smooth valve stems unmanly?"
- - General --
"Are smooth valve stems unmanly?"
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On a related note, I'm looking for a small pump to carry along that has both a presta and schrader head (like my floor pump) any recommendations?
My tires are all presta, but my airshocks are schrader. Also, it seems bikes around here are about 50/50 and I like to be able to help people if they have flats.
My tires are all presta, but my airshocks are schrader. Also, it seems bikes around here are about 50/50 and I like to be able to help people if they have flats.
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On a related note, I'm looking for a small pump to carry along that has both a presta and schrader head (like my floor pump) any recommendations?
My tires are all presta, but my airshocks are schrader. Also, it seems bikes around here are about 50/50 and I like to be able to help people if they have flats.
My tires are all presta, but my airshocks are schrader. Also, it seems bikes around here are about 50/50 and I like to be able to help people if they have flats.
https://www.amazon.com/Adapter-Schra.../dp/B01M3XXRMM
ACE stocks the SLIME brand.
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If I lived in a city and had a nice fat tired bike I'd want Schrader valves.
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Okay, perhaps you have learnt something or not, before you jump in with your criticism next time, look at the big picture of how people use bikes......everywhere. Many people here( it is the www) preferred the schraeder simply because it offers them the convenience of using gas station air( of course we are not talking about serious Tour de France wannabes) but this forum isnt just for those is it?
How hard or inconvenient is using a pump?
#94
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How about reading carefully before you criticise.
Going back to the context of why some may have developed a preference for schraeder valves and using gas station pumps, perhaps you still haven't researched the nasty contraptions provided to try and inflate tyres in countries other than the US from years ago. I mentioned the horrible devices with flexible rubber hoses which would inevitably perish and leak within months and make using a hand pump a unpleasant chore:
https://www.ebay.com.au/itm/NEW-BIKE...D/351059883745
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But some people are spewing nonsense about the "difficulty" of presta.
It's not a big deal to use presta. It's not a big deal using schrader.
Ancient history.
Last edited by njkayaker; 03-24-21 at 03:13 PM.
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I remember, as a kid, that using the compressor at the gas station was a sure way to have a tube explode because the volume of air they put out.
At home I use a track pump and on the road I use Co2 since i rather not carry a pump.
Using a gas station is not really an option since most require you to pay for air these days.
BTW... Presta valve adapters are usually in a jar next to the register at the LBS for $1. Toss one in your saddle bag and you can use the compressor at the gas station.
At home I use a track pump and on the road I use Co2 since i rather not carry a pump.
Using a gas station is not really an option since most require you to pay for air these days.
BTW... Presta valve adapters are usually in a jar next to the register at the LBS for $1. Toss one in your saddle bag and you can use the compressor at the gas station.
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I have to admit sometimes these BF threads reach the level of a medieval theological discussion. But I do not do group rides, so maybe it even has shunning...
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