10
votes
Accepted
What are these female connectors called?
"THREAD-ON SCHRADER CHUCK" yields good search results
- 20.6k
9
votes
Why is the retaining nut ("thumbscrew") against the wheel rim for inner tube Schrader valves no longer used?
Schwalbe tubes still have this feature. Schwalbe tubes are also high quality tubes with moderate weight, consistent construction (no lumpiness near the valve) and high latex content (helps rolling ...
- 3,316
8
votes
Accepted
Considering modern bicycle trends (2021), why are presta valves still the dominant design?
I think you are correct; there is no technical advantage of Presta. But many things are not used for technical reasons but rather for momentum reasons.
Personally I prefer schrader for all my bikes, ...
- 3,316
8
votes
Considering modern bicycle trends (2021), why are presta valves still the dominant design?
Presta (btw: we call it Sclaverand or simply road bike valve here in Austria) has one advantage: You can easily release air.
There could also be some small weight savings and aerodynamic benefits. I ...
- 26k
7
votes
Outside of Schrader valve is inflating. This isn’t right, is it?
I haven't come across this before but it's not right. It sounds like the valve coating is coming unstuck from the metal part of the valve. If that fails it would be quite likely to fail suddenly which ...
- 57.2k
7
votes
Accepted
Is my Schrader valve spoilt?
Your valve has slipped partially inside the hole in the rim where it exits. Normally it's on average about 1-1/2" outside the hole. You'll need to inspect the valve body to see if it's cut. You can't ...
- 534
7
votes
Accepted
Can a bike have both Schrader and Presta tires?
Short answer, it's not common at all and probably wasn't like that when the bike was new.
The valve that you need is determined by the rim rather than the bike. If the rim is drilled out with a big ...
- 4,175
7
votes
Is there a pump / Schrader valve adapter that prevent leakage during disconnection?
Much of the drop you see will be due to the reconnection, not the disconnection.
When you disconnect the pump you have 120psi in the tyre and the hose, gauge and a little bit of pump. This ...
- 57.2k
7
votes
Is a powered car tire inflator suitable for road bike tire inflation?
Buy a floor pump, also known as a track pump, instead of an automotive accessory.
A track pump will take about the same time to top up your tires as a small car compressor, and has an advantage of ...
- 121k
6
votes
Accepted
Why did my valve pin bend? Is there anything that I can do to help it without any specialized tools?
You have a Schrader valve. The pin on the valve core has been bent or the core is cross threaded in the stem - the picture is a little blurry.
You can remove the core by unscrewing it from the stem. ...
- 20.6k
6
votes
Why is the retaining nut ("thumbscrew") against the wheel rim for inner tube Schrader valves no longer used?
Because it makes the tubes less expensive (no need to include the nut, and they can use less metal in the valve construction because they don’t need the screw thread to go all the way down), and most ...
- 1,101
5
votes
Is a powered car tire inflator suitable for road bike tire inflation?
I have one of such compressors for car use and of course I have used it on my bikes.
However, I only use it on MTB bikes which I inflate to 40 psi at most. I Do not own a road bike but some slick ...
- 12.4k
5
votes
Schrader inner tube gets cut by Presta sized hole in rim
The cheapest solution is to try and remove the burrs or sharp edges that are cutting the tube. This can be done with a small file or a piece of emery cloth cut into a small strip and pushed through ...
- 18.4k
5
votes
Any fix for a schrader valve that won't open?
Sounds like the valve has stuck shut, this can happen if the rubber seal at the base of the valve swells up. If the valve core is replaceable just get the appropriate valve tool and a replacement core,...
- 691
5
votes
Is my Schrader valve spoilt?
Assuming the issue is getting the pump head to lock on the valve.
Your tube has shifted and now the valve looks really short. You'll have to deflate the tube completely and move the tire around to ...
5
votes
Bicycle hand pump pressure gauge
I have a Topeak "Road Morph" mini pump on my bike, and the pressure gauge on that is at best a distraction. The display is a bit of plastic sliding in a tube, so there's a lot of friction and that ...
- 23.3k
5
votes
Why did my valve pin bend? Is there anything that I can do to help it without any specialized tools?
Just use one of these as a valve cap. You can probably remove the dodgy core with it, and either bend it straight or replace with one from a spare tube.
- 53.4k
4
votes
Schrader tubes in Presta configured Rims?
Actually, correct drill bit size is 21/64", not 3/8"
http://sheldonbrown.com/gloss_sa-o.html - search for Schrader
- 161
4
votes
Can a bike have both Schrader and Presta tires?
Why not? The bike will roll anyway. You would need two pump heads or an adapter to pump both tires, but other than that, it will work just fine.
- 14.4k
4
votes
Accepted
Is a powered car tire inflator suitable for road bike tire inflation?
There's a lot going on in this question!
The pump pictured seems to be intended for car tyres which can be considered high volume, low pressure and feature Schrader valves.
A 120 psi road bike tyre ...
- 12.7k
4
votes
Bike pump issues
I know it's normal to lose a bit of air when getting the pump off but I'm not sure about this
The air you lose when taking the pump off should be just a very brief hiss. And, actually, it's mostly ...
- 17k
4
votes
Possible faulty Schrader valve
In my experience, when a Schrader valve starts leaking suddenly, the most common reason is that there is a small piece of debris that prevents the valve from closing. The easiest way to remove them is ...
- 21.8k
4
votes
Bits "peeling off" schrader valve?
The type of damage shown is often due to under inflation or not centering the valve stem in the hole. When under inflated the tube doesn't exert enough pressure on the tire bead. This allows the tire ...
- 18.4k
4
votes
Why did my valve pin bend? Is there anything that I can do to help it without any specialized tools?
It looks like the valve core is missing. If it is just bent, then I cannot see it in the picture.
If it is indeed missing, then it might have been unscrewed and then it popped out due to the pressure ...
- 16.1k
4
votes
Presta to Schrader valve adapters that don't screw on the valve core
Never seen one myself - there are pumps that have push-on "speed" adapters for presta, but they are part of the pump head and you wouldn't find one at the service station.
The best fix is to ...
- 121k
4
votes
Presta to Schrader valve adapters that don't screw on the valve core
SKS makes a press-on adapter. Unscrew the valve nut, push the adapter on, use the schraeder head on the air hose, pull the adapter off and thread the valve nut back down. Tell your shop it's p/n ...
- 131
4
votes
Why are thorn resistant tubes prone to valve stem failures?
I talked it over with an experienced sales rep. who said the Taiwan TP tube makers are aware of the issue but unable or unwilling to solve it. At its heart is the thin and weak joint between the TP ...
- 258
4
votes
What is causing leaks where metal meets rubber on stem?
It is unlikely that the leak is coming from that spot, as David said that is a solid tube of metal. You could be feeling air escaping there due to either a poorly seated/loose valve core, or sometimes ...
- 1,490
3
votes
What does the number 77 mean on the Schrader valve?
A Schrader valve has an external width of 7.7mm per the specification. The number written on your valve refers to this fact.
Source: https://en.wikipedia.org/wiki/Schrader_valve#Dimensions
- 598
3
votes
Schrader inner tube gets cut by Presta sized hole in rim
Try covering the hole from the inside with gorilla tape and opening the hole back up with an x cut pattern like you would with ghetto tubeless.
- 166
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