Presta valve
03-23-21, 06:40 AM
#76
Senior Member
Join Date: Sep 2007
Location: Far beyond the pale horizon.
Posts: 14,272
Mentioned: 31 Post(s)
Tagged: 0 Thread(s)
Quoted: 4257 Post(s)
Liked 1,355 Times
in
941 Posts
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.
03-23-21, 07:38 AM
#78
Newbie
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
03-23-21, 07:54 AM
#79
Senior Member
Join Date: Sep 2007
Location: Far beyond the pale horizon.
Posts: 14,272
Mentioned: 31 Post(s)
Tagged: 0 Thread(s)
Quoted: 4257 Post(s)
Liked 1,355 Times
in
941 Posts
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.
03-23-21, 10:25 AM
#80
Senior Member
Join Date: Sep 2014
Posts: 3,893
Mentioned: 20 Post(s)
Tagged: 0 Thread(s)
Quoted: 1062 Post(s)
Liked 665 Times
in
421 Posts
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.
03-23-21, 12:04 PM
#82
Old fart
Join Date: Nov 2004
Location: Appleton WI
Posts: 24,784
Bikes: Several, mostly not name brands.
Mentioned: 153 Post(s)
Tagged: 0 Thread(s)
Quoted: 3587 Post(s)
Liked 3,400 Times
in
1,934 Posts
Likes For JohnDThompson:
03-23-21, 01:57 PM
#84
Newbie
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?
03-23-21, 03:04 PM
#85
Senior Member
Join Date: Oct 2013
Location: Mich
Posts: 7,389
Bikes: RSO E-tire dropper fixie brifter
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 6 Post(s)
Liked 2,969 Times
in
1,918 Posts
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.
__________________
-Oh Hey!
-Oh Hey!
03-23-21, 03:05 PM
#86
Senior Member
Join Date: Jan 2005
Location: Baltimore, MD
Posts: 5,373
Mentioned: 15 Post(s)
Tagged: 0 Thread(s)
Quoted: 2482 Post(s)
Liked 2,954 Times
in
1,678 Posts
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.
03-23-21, 04:36 PM
#87
Senior Member
Join Date: Sep 2014
Posts: 3,893
Mentioned: 20 Post(s)
Tagged: 0 Thread(s)
Quoted: 1062 Post(s)
Liked 665 Times
in
421 Posts
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.
Likes For Gresp15C:
03-23-21, 04:59 PM
#88
Banned
Join Date: Feb 2008
Location: Mississauga/Toronto, Ontario canada
Posts: 8,721
Bikes: I have 3 singlespeed/fixed gear bikes
Mentioned: 30 Post(s)
Tagged: 0 Thread(s)
Quoted: 4227 Post(s)
Liked 2,488 Times
in
1,286 Posts
After this thread finally expires around December 2021, another thread will be started about: "valve stem caps vs no valve stem caps".
Likes For wolfchild:
03-23-21, 06:02 PM
#89
Senior Member
Join Date: Oct 2013
Location: Mich
Posts: 7,389
Bikes: RSO E-tire dropper fixie brifter
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 6 Post(s)
Liked 2,969 Times
in
1,918 Posts
November 2021 -
- - General --
"Are smooth valve stems unmanly?"
- - General --
"Are smooth valve stems unmanly?"
__________________
-Oh Hey!
-Oh Hey!
03-24-21, 07:55 AM
#90
Senior Member
Join Date: Dec 2011
Location: Layton, UT
Posts: 1,606
Bikes: 2011 Bent TW Elegance 2014 Carbon Strada Velomobile
Mentioned: 6 Post(s)
Tagged: 0 Thread(s)
Quoted: 626 Post(s)
Liked 701 Times
in
418 Posts
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.
03-24-21, 07:59 AM
#91
Senior Member
Join Date: Oct 2013
Location: Mich
Posts: 7,389
Bikes: RSO E-tire dropper fixie brifter
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 6 Post(s)
Liked 2,969 Times
in
1,918 Posts
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.
__________________
-Oh Hey!
-Oh Hey!
Likes For Troul:
03-24-21, 08:22 AM
#92
I’m a little Surly
Join Date: Jan 2010
Location: Near the district
Posts: 2,422
Bikes: Two Cross Checks, a Karate Monkey, a Disc Trucker, and a VO Randonneur
Mentioned: 5 Post(s)
Tagged: 0 Thread(s)
Quoted: 699 Post(s)
Liked 1,294 Times
in
647 Posts
If I lived in a city and had a nice fat tired bike I'd want Schrader valves.
03-24-21, 09:59 AM
#93
Senior Member
Join Date: Sep 2007
Location: Far beyond the pale horizon.
Posts: 14,272
Mentioned: 31 Post(s)
Tagged: 0 Thread(s)
Quoted: 4257 Post(s)
Liked 1,355 Times
in
941 Posts
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?
03-24-21, 01:55 PM
#94
Newbie
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
03-24-21, 03:08 PM
#95
Senior Member
Join Date: Sep 2007
Location: Far beyond the pale horizon.
Posts: 14,272
Mentioned: 31 Post(s)
Tagged: 0 Thread(s)
Quoted: 4257 Post(s)
Liked 1,355 Times
in
941 Posts
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.
03-24-21, 06:56 PM
#96
Banned
Join Date: Feb 2008
Location: Mississauga/Toronto, Ontario canada
Posts: 8,721
Bikes: I have 3 singlespeed/fixed gear bikes
Mentioned: 30 Post(s)
Tagged: 0 Thread(s)
Quoted: 4227 Post(s)
Liked 2,488 Times
in
1,286 Posts
03-24-21, 07:20 PM
#97
On Your Left
Join Date: Nov 2011
Location: Long Island, New York, USA
Posts: 8,373
Bikes: Trek Emonda SLR, Sram eTap, Zipp 303
Mentioned: 34 Post(s)
Tagged: 0 Thread(s)
Quoted: 3004 Post(s)
Liked 2,433 Times
in
1,187 Posts
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.
03-29-21, 02:03 PM
#98
Senior Member
Join Date: Aug 2017
Location: Northern Virginia
Posts: 727
Bikes: Current: 2016 Bianchi Volpe; 1973 Peugeot UO-8. Past: 1974 Fuji S-10-S with custom black Imron paint by Stinsman Racing of PA.
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 215 Post(s)
Liked 204 Times
in
142 Posts
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...
03-30-21, 02:03 PM
#99
Senior Member
Join Date: Apr 2011
Location: Alpharetta, GA
Posts: 15,280
Bikes: Nashbar Road
Mentioned: 71 Post(s)
Tagged: 0 Thread(s)
Quoted: 2934 Post(s)
Liked 341 Times
in
228 Posts
Likes For wphamilton:
03-30-21, 03:11 PM
#100
Senior Member
Join Date: Jul 2009
Posts: 5,949
Bikes: Colnago, Van Dessel, Factor, Cervelo, Ritchey
Mentioned: 5 Post(s)
Tagged: 0 Thread(s)
Quoted: 3949 Post(s)
Liked 7,296 Times
in
2,946 Posts