Premium Valve Cores
#26
Senior Member
Join Date: Nov 2014
Location: Eugene, Oregon, USA
Posts: 27,600
Mentioned: 217 Post(s)
Tagged: 0 Thread(s)
Quoted: 18320 Post(s)
Liked 4,489 Times
in
3,338 Posts
Usually every time I drive. Sometimes a couple of times between uses too.
Of course, I just got my Blazer back on the road for the first time in 4 1/2 years.
Tires, Tubes, whatever, will leak down slowly.
The thicker the tire/tube, and with the more volume the slower it will leak down.
The thinner the tire/tube, and the less volume, the faster it will leak down.
On my bike, I'll monitor the pressure regularly, but will only pump up once a month or so. But, I also let the pressure vary considerably, probably somewhere in the range of about 50 to 110 lbs.
Of course, I just got my Blazer back on the road for the first time in 4 1/2 years.
Tires, Tubes, whatever, will leak down slowly.
The thicker the tire/tube, and with the more volume the slower it will leak down.
The thinner the tire/tube, and the less volume, the faster it will leak down.
On my bike, I'll monitor the pressure regularly, but will only pump up once a month or so. But, I also let the pressure vary considerably, probably somewhere in the range of about 50 to 110 lbs.
#27
Senior Member
Join Date: Oct 2014
Location: Portland, OR
Posts: 12,830
Bikes: (2) ti TiCycles, 2007 w/ triple and 2011 fixed, 1979 Peter Mooney, ~1983 Trek 420 now fixed and ~1973 Raleigh Carlton Competition gravel grinder
Mentioned: 128 Post(s)
Tagged: 0 Thread(s)
Quoted: 4745 Post(s)
Liked 3,861 Times
in
2,510 Posts
Ben
#28
Senior Member
Join Date: Nov 2014
Location: Eugene, Oregon, USA
Posts: 27,600
Mentioned: 217 Post(s)
Tagged: 0 Thread(s)
Quoted: 18320 Post(s)
Liked 4,489 Times
in
3,338 Posts
I don't think that most of that is true. Schrader valves are found lots of places besides relatively low pressure automobile tires. Trucks, for instance commonly use around 100psi tire pressure and they use Schrader valves. How about your home air conditioner? Lots higher pressure and they are expected to not leak at all.
I do like the Presta on bikes, but there really isn't a good reason.
There may be other Presta/Schrader adapters, but it probably isn't necessary as long as there aren't any burrs in the hole.
#29
Senior Member
Join Date: Feb 2007
Posts: 1,378
Mentioned: 5 Post(s)
Tagged: 0 Thread(s)
Quoted: 598 Post(s)
Likes: 0
Liked 374 Times
in
261 Posts
The thicker the tire/tube, and with the more volume the slower it will leak down.
The thinner the tire/tube, and the less volume, the faster it will leak down.
The thinner the tire/tube, and the less volume, the faster it will leak down.
#30
Senior Member
Join Date: Sep 2010
Location: Roswell, GA
Posts: 8,319
Bikes: '93 Trek 750, '92 Schwinn Crisscross, '93 Mongoose Alta
Mentioned: 30 Post(s)
Tagged: 0 Thread(s)
Quoted: 1438 Post(s)
Liked 1,092 Times
in
723 Posts
"It seem to be an issue with any tube I've used to date (different brands, etc)."
Somehow I don't think that they are all defective. One or two here and there, maybe. All of them? Nah.
Somehow I don't think that they are all defective. One or two here and there, maybe. All of them? Nah.
#31
Senior Member
Join Date: Nov 2014
Location: Eugene, Oregon, USA
Posts: 27,600
Mentioned: 217 Post(s)
Tagged: 0 Thread(s)
Quoted: 18320 Post(s)
Liked 4,489 Times
in
3,338 Posts
Oh, another thing. Sealant can make a mess out of just about anything.
Not saying it is bad, but just one has to be prepared. Remove and clean the core and stem?
Not saying it is bad, but just one has to be prepared. Remove and clean the core and stem?
#32
Senior Member
Join Date: Feb 2004
Location: St Peters, Missouri
Posts: 30,225
Bikes: Catrike 559 I own some others but they don't get ridden very much.
Mentioned: 16 Post(s)
Tagged: 0 Thread(s)
Quoted: 1572 Post(s)
Liked 642 Times
in
363 Posts
Actually, I take it back. You thread a needle so I don't think my use of that word was incorrect at all.
__________________
My greatest fear is all of my kids standing around my coffin and talking about "how sensible" dad was.
My greatest fear is all of my kids standing around my coffin and talking about "how sensible" dad was.
#33
I'm the anecdote.
Join Date: Apr 2019
Location: S.E. Texas
Posts: 1,823
Bikes: '12 Schwinn, '13 Norco
Mentioned: 9 Post(s)
Tagged: 0 Thread(s)
Quoted: 1110 Post(s)
Liked 1,176 Times
in
795 Posts
I have had valve cores leak, but it's very rare. Usually you can see a valve core fail the water dunk test by the bubbles coming out.
Of course, one could buy a set of the metal valve caps with the seal inside the cap if your really concerned about cores leaking.
Permeability of tubes was mentioned as well. I can say that in my limited experience with thick thorn resistant bicycle tubes that they hold air much longer than the standard thin tubes.
Of course, one could buy a set of the metal valve caps with the seal inside the cap if your really concerned about cores leaking.
Permeability of tubes was mentioned as well. I can say that in my limited experience with thick thorn resistant bicycle tubes that they hold air much longer than the standard thin tubes.
Last edited by FiftySix; 06-18-19 at 05:57 PM. Reason: fixin' incorrectness
#34
Senior Member
Join Date: Jun 2005
Location: Kentucky
Posts: 2,579
Bikes: 06 Lemond Reno, 98 GT Timberline mtn.bike
Mentioned: 7 Post(s)
Tagged: 0 Thread(s)
Quoted: 421 Post(s)
Liked 690 Times
in
430 Posts
I have had different brands of tubes lose air at different rates. My wife's road bike (presta valved tubes) loses air quicker in the front tire than the rear. Neither tube has been patched, neither has any sealant, tires and rims are free of anything which would cause a leak. Isn't major enough to replace the tube which loses air more quickly, but it's noticeable after the bike might sit for a while. The only thing I can figure is that the tubes are dif.brands and lose air at dif.rates (don't remember brand names). Maybe you could try a different brand of tube?
#35
Senior member
Join Date: Oct 2004
Location: Oakville Ontario
Posts: 8,108
Mentioned: 25 Post(s)
Tagged: 0 Thread(s)
Quoted: 937 Post(s)
Liked 652 Times
in
367 Posts
Usually, a leaking Shrader valve is an indication it just needs to be tightened into the stem a bit. A core removal tool can be used to do it.
Likes For Dan Burkhart:
#36
cowboy, steel horse, etc
Join Date: Sep 2008
Location: The hot spot.
Posts: 44,801
Bikes: everywhere
Mentioned: 71 Post(s)
Tagged: 1 Thread(s)
Quoted: 12635 Post(s)
Liked 7,528 Times
in
3,989 Posts
Then you just pop it on and air it up. No levers, no screwing,
#37
1/2 as far in 2x the time
Join Date: Nov 2013
Location: Northern Bergen County, NJ
Posts: 1,935
Bikes: Yes, Please.
Mentioned: 13 Post(s)
Tagged: 0 Thread(s)
Quoted: 499 Post(s)
Liked 285 Times
in
222 Posts
R G -
I would not consider uttering "incorrect" and thereby contradict you, but might we not be able to agree that certain less erudite folk,* find "threading" a somewhat unusual usage of the term in the example above ... For is one not actually using thread when one "threads a needle"? Thus perhaps one might use in this way, the phrase "chucking a valve", to describe the action of enclosing a valve stem with a chuck, prior to pumping?
Yours in pedantry, Last
*Amongst whom I must, with downcast eyes, take my rightful place.
#38
1/2 as far in 2x the time
Join Date: Nov 2013
Location: Northern Bergen County, NJ
Posts: 1,935
Bikes: Yes, Please.
Mentioned: 13 Post(s)
Tagged: 0 Thread(s)
Quoted: 499 Post(s)
Liked 285 Times
in
222 Posts
I would imagine that a gentleman going by the name of "Retro Grouch" is probably familiar with a Silca type pump head.
Regarding ease of inflation...I think that was his point, if one has a hose that is connected to an on demand compressor, like at a gas station, Schrader heads/valves are quicker, potentially, as they provide instant inflation just by making proper contact, whereas the Silca type as pictured would require an additional mechanism to prevent the air from escaping when not inflating the tube. ( Think NASCAR pit stop for reference.)
Last edited by Last ride 76; 06-19-19 at 06:21 PM.
#40
Member
Join Date: Jan 2019
Posts: 31
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 11 Post(s)
Likes: 0
Liked 1 Time
in
1 Post
My wheels have schrader valves and I debated a long time using grommets to go presta. Then I stumbled on the Continentals with the metal stem. I’ve been very pleased with the results holding pressure. Maybe try a couple. They are not for 28 as the label appears to indicate when you look at it. I used it with 32s, and when I tried to put them into a 28 the tube was too large and had folds so I stuck with the 32. May have been that specific tire, but it was a pretty good size fold for the 28.