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Questions tagged [schrader]

A type of air valve used for refilling automobile tires and some bicycle tubes.

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3 votes
4 answers
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Is it a good idea to use a Presta-to-Schrader adapter and Schrader mini pump if you have bikes with both valve types?

I have bikes with two types of valves: Presta and Schrader. Usually when buying bikes or rims, I'm very careful to buy only Presta stuff. If I for some reason end up with a Schrader rim, I may go even ...
juhist's user avatar
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3 votes
2 answers
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What is causing leaks where metal meets rubber on stem?

What causes a bicycle tube to leak where the metal meets the rubber on a Schrader valve stem? I've had three tubes fail the same way over the past year. I make sure the stems are perpendicular to the ...
Zack's user avatar
  • 203
11 votes
3 answers
2k views

Why is the retaining nut ("thumbscrew") against the wheel rim for inner tube Schrader valves no longer used?

The Schrader valve retreats back into the inner tube because there is nothing to hold it in place against the wheel rim. Despite having an outer screw thread on the protruding valve nothing is there ...
Roger's user avatar
  • 111
6 votes
2 answers
252 views

Why are thorn resistant tubes prone to valve stem failures?

I would welcome knowledgeable answers rather than opinions please. I have been cycling 50+ years and now work in an LBS. I have seen numerous examples of so-called “thorn-proof” TP tubes, of different ...
Henry S's user avatar
  • 267
7 votes
5 answers
2k views

Considering modern bicycle trends (2021), why are presta valves still the dominant design?

The usual trope justifying the use of Presta valves over Schrader valves is no longer logical (in my opinion at least) because of changes in wheel, rim, and tire systems. Let me exemplify by refuting ...
MaplePanda's user avatar
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6 votes
2 answers
1k views

What are these female connectors called?

I need help finding out what these female connectors/attachments are called so that I can buy them for my air tank project. Basically these are found on those portable air compressors which connect to ...
Kokachi's user avatar
  • 163
-1 votes
2 answers
125 views

Is this a Schrader valve?

Is it possible to determine from these 2 photos, whether this valve is a Schrader valve (i.e. the type of valve that is also found on automobile tyres) ?
rowote's user avatar
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4 votes
2 answers
946 views

Presta to Schrader valve adapters that don't screw on the valve core

Do any exist? I want to easily use a gas station compressor without worrying about popping my valve core out when I unscrew the adapter after use. No, I don't want to "just use Schrader-valve ...
Gregory Leo's user avatar
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0 votes
2 answers
7k views

How to stop air leak when disconnecting inflator from Schrader valve?

People say that the pin must be pressed down in order for the air to get in. But when I try to remove the pump head by unlocking the lever, too much air leaks before I get to remove the pump.
Alaskaboi32's user avatar
5 votes
3 answers
5k views

Why did my valve pin bend? Is there anything that I can do to help it without any specialized tools?

I have a new bike (been less than a month since it was purchased) and has been ridden for about 600km (375 miles) on bad city roads. What may have caused this bend of the valve pin? Is it possible ...
Timon's user avatar
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3 votes
2 answers
219 views

Bits "peeling off" schrader valve?

I've got a bike that hadn't been used in a while until a couple weeks ago, it was in a place where it gets direct sunlight (I'm trying to fix that) and as a result some things like the seat have ...
Gregorio Litenstein's user avatar
0 votes
2 answers
5k views

Can't inflate my bike tires

Received an old bike from a family member and I've tried to inflate the tires but whenever I attach the pump to the tire it seems that I can't inflate it. All I hear is a hissing and it feels like all ...
Emma's user avatar
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1 vote
2 answers
4k views

Possible faulty Schrader valve

I have a Schrader valve that is leaking air. I have a feeling that I over inflated the tyre. Recommended was 40-65psi and gaugue was showing just over 60. Up until that point it was pumping fine and ...
Mike's user avatar
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7 votes
7 answers
7k views

Is a powered car tire inflator suitable for road bike tire inflation?

I'm switching to road cycling. My diminutive and portable pump will likely be a pain to get 120psi. Rather than get a foot pump with either a built-in or an external pressure gauge, I'm thinking of ...
Sam7919's user avatar
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2 votes
1 answer
1k views

Presta to Schrader Conversion

I've been procrastinating for several years about converting from Presta to Schrader on my Trek 4200 with Bontrager AT650 (erto 559x19) wheels. What finally convinced me was getting three flats on a ...
Buadhai's user avatar
  • 123
0 votes
1 answer
1k views

Install tube sealant, Schrader?

I have normal tube sealant that I want to install in my bicycle's tubes. My bicycle's tubes have Schrader valves. Will someone here please provide total-noob friendly instructions on how to do what ...
Cycle_Health's user avatar
5 votes
1 answer
352 views

What does the number 77 mean on the Schrader valve?

Can anyone please tell me what this number on the valve mean?
Lisa's user avatar
  • 51
1 vote
2 answers
291 views

Bike pump issues

I got a Diamondback Viper for Christmas. The tires got a bit deflated so I got a $5 bike pump and I attempted to pump up the tires. All went well for a couple of seconds then all the air from the tube ...
Alex Jones's user avatar
3 votes
4 answers
3k views

Can a bike have both Schrader and Presta tires?

I have Kona Dew 2018 and the front tire has a Presta valve while the back tire has a Schrader valve. Is it common to see bikes have different valves for each tire?
Sarvesh's user avatar
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1 vote
1 answer
1k views

How to attach mini-pump to valve on kids' bike with no space to manoeuver?

I bought a new, unused mini-pump from Ebay, here: https://bit.ly/2HbbYRW From the enlarged views, you can see that the pump works with both Presta and Schrader valves. For two kid's bikes, I can ...
OldGrantonian's user avatar
1 vote
1 answer
417 views

How to use a stirrup pump on kids bikes - no space for chuck?

My last bike experience was about 56 years ago. I now want to inflate the tyres of my grandchildren's bikes. I have a steel stirrup pump (floor pump) with presta and schrader orifices in the chuck. I'...
OldGrantonian's user avatar
4 votes
2 answers
1k views

Schrader inner tube gets cut by Presta sized hole in rim

I am new at bikes. I got an old bike with flat tires which I decided to put back to life. I went to Walmart and got the cheapest inner tubes (Goodyear) which turned out to be Schrader type. I had no ...
sprogissd's user avatar
  • 141
1 vote
2 answers
2k views

Is there a pump / Schrader valve adapter that prevent leakage during disconnection?

My tyres are rated at 120psi and I like to inflate them close to that. My pump is electric with presure indicator. If I just unscrew the pump and connect it back the pressure drops by about 20psi. I ...
Aelian's user avatar
  • 205
4 votes
3 answers
396 views

Outside of Schrader valve is inflating. This isn’t right, is it?

My wife has an old Moulton bike. I was inflating her tyres (small wheels, tyre imprinted ‘50 pounds’, when the rubber surround of the Schrader valve started inflating also. It all seems quite ...
Midnight_Voice's user avatar
0 votes
0 answers
190 views

Bicycle Pump: Dual (Schraeder/Presta) automatic valve stuck [duplicate]

I got a pump with an head like this, and I use both the presta and the schraeder opening. The problem is that the automatic switching does not seem to work as well as it once did. It is pretty random ...
Paul Weber's user avatar
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4 votes
5 answers
30k views

Any fix for a schrader valve that won't open?

I have the all too familiar problem of being unable to pump up my tyre :( It's not a problem with the pump (because it works on the other wheel) so I guess there must be something wrong with the ...
bikeless_in_berlin's user avatar
5 votes
2 answers
3k views

Is my Schrader valve spoilt?

(Tried searching this forum for this question but I couldn't find a question of the same type) Hello, I've been trying to pump my front tyre but to no avail. I could easily pump the back tyre but not ...
user23716's user avatar
3 votes
1 answer
3k views

Bicycle hand pump pressure gauge

Today I got my new bike pump. It is a two-way pump with pressure gauge, up to 100 psi, that I bought cheaply over the internet. When I tried to pump up my tire (Schrader valve) it seemed to be working,...
SuperMan's user avatar
  • 241
2 votes
1 answer
928 views

remove "wrench force" floor bike pump from the schrader valve

It is embarrassing for me to say the number of tubes I have destroyed removing the chuck. Are there techniques or adapters I am missing? Or do I have a defective chuck?
zerowords's user avatar
  • 123
4 votes
1 answer
907 views

How to safely remove pump chuck from Schrader valve

I just pumped up my tire, and then ripped off the valve when trying to take the chuck off, and consequently the air. I've learned that I shouldn't twist when trying to remove the chuck, but what else ...
Vigrond's user avatar
  • 143
2 votes
1 answer
19k views

how to pump up schrader valve bike?

I'm quite new to bikes. I have a Schrader valve bike with deflated wheels. When I try to pump it up. I take off the protective cap, then there is a valve secured down by a nut (there is another nut ...
jamee's user avatar
  • 21
4 votes
1 answer
2k views

What type of valve do shock pumps use?

Do all shock pumps use a schrader valve? I've just taken a look at a couple of product listings and found no mention of the valve type. I guess that might be to avoid people buying those pumps for ...
Colin Newell's user avatar
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14 votes
8 answers
51k views

Schrader tubes in Presta configured Rims?

My 26" mtb rims support presta sized tube stems, however can I drill the diameter of the holes in the rims bigger in order to support Schrader stemmed tubes? what is the proper way to do this, is ...
sov's user avatar
  • 333
6 votes
4 answers
25k views

Tube constantly getting punctured near the valve

I have been using my bike for a few years now, and for the last month i am constantly getting this problem. After riding a day or two, it looks like my tube gets rotated a little inside the tire, and ...
anatolyg's user avatar
  • 1,264
24 votes
7 answers
8k views

Which kind of tube valve is the best?

What kind of valve is the best one, a Presta valve (6mm) or a Schrader valve (8mm). Which has the best reliability, which one is easiest to fix a flat on?
Johan Dahlin's user avatar
  • 2,908
50 votes
11 answers
115k views

Can I use a Presta tube in a Schrader rim?

I keep losing pressure in my tires, and among other things, I'm looking at the valves in the tubes. It's an old mountain bike with 26 inch tires. Can I use Presta tubes on rims drilled for Schrader ...
Brock Boland's user avatar
  • 1,119