All Questions
22 questions
6
votes
2
answers
3k
views
How to prevent a Presta valve core from unscrewing when disconnecting a pump [duplicate]
My mini-pump has a screw-on head (as I guess most of them do) and several times when removing the pump from the valve, it's taken the valve core out with it.
The last time this happened to me on the ...
- 4,043
2
votes
1
answer
734
views
Dunlop valve core comes off with the cap
Could someone please enlighten me if my valve is broken? I think this is a Dunlop valve but the core seems completely stuck to the cap. No matter how much I twist and turn the core always comes off ...
- 21
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 ...
- 17.4k
4
votes
4
answers
1k
views
"Soft" valve insert for easier pumping
I've just bought my first bike in 20 years - a 29" mountain bike. And, inevitably, I've just got my first puncture in 20 years, and a lot has changed. The first thing I noticed is that today's ...
- 41
1
vote
1
answer
529
views
How do I inflate this bicycle tire valve? [duplicate]
I inherited this bike with this funny looking stem. Is this broken? How do I inflate it?
- 111
4
votes
2
answers
2k
views
What is the typical structure and location of a check valve in a floor pump?
I decided to take apart a Bontrager reCharger floor pump recently on a whim, one of those whims during which you pay no attention at all to what you're doing. After putting it back together, the pump ...
- 141
2
votes
1
answer
368
views
What is this valve and how do I fill it?
This is the valve in one of the tubes on my bike:
What kind of valve is this, and how do I fill it?
I originally thought it was a Presta valve, but it doesn't look or work like any of the presta ...
- 137
8
votes
2
answers
6k
views
How does this hand pump work
Some time ago I bought this pump. It should be usable for all valves, but I'm not sure how that is supposed to work and it didn't come with a manual.
On one side there's a lever, on the other side (...
- 1,083
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 ...
- 205
21
votes
1
answer
4k
views
How does a bicycle pump *head* work?
Asking about the pump heads that are pressed on the valve, not screwed. One has to lift a lever before pumping. After pumping, push the lever down before removing pump head. I would like to understand ...
- 643
5
votes
4
answers
12k
views
Open up blocked Dunlop valves
When I try to pump my bike tires (Dunlop valves), the valves resist letting air in. It's as if I'm trying to pump air through a blocked valve. If I push really hard and I have a lucky day, something ...
- 153
1
vote
0
answers
2k
views
How to gauge pressure w/ Presta valve and Schrader adapter?
I've bought a floor pump which doesn't have a Presta nozzle, only a Schrader one, and it comes with an Presta to Schrader adapter included. The pump has an integrated gauge, up to 160 psi.
My bike, ...
- 175
3
votes
2
answers
1k
views
Bike Floor Pump for Raleigh Talus 3.0
I'm trying to find a good floor pump for my Raleigh Talus 3.0 bike which I recently purchased. I don't know much about bikes and have seen that there are different valve types (i.e. - Presta and ...
- 175
11
votes
2
answers
3k
views
What type is my bike valve, and why can't I pump it up?
so I've taken some pictures of the valve on my bike tyre (if you zoom out they look clearer...), below. Basically, it's a new bike and I have no experience around these things. The pump I have doesn't ...
0
votes
1
answer
482
views
What kind of pump/attachment do I need for this? (picture)
I am having trouble identifying what tools I need to pump these tires.
We bought some kind of kit that came with multiple attachments and none of them worked. Wondering if something is missing?
All ...
- 115
4
votes
1
answer
951
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 ...
- 143
3
votes
2
answers
60k
views
Cannot fit pump nozzle properly to the presta valve of my tyre
I bought a Reebok Bike pump yesterday which is this one. I have presta valves for my Jamis Allegro Sport 2012 hybrid bike and I was trying to pump the tyres using the pump as part of my monthly ...
- 436
13
votes
9
answers
268k
views
How to inflate a tire with a Presta valve?
My new bike has these thin tires with a type of valve I haven't usedbefore. I searched online and found out it's called a Presta valve, and it's pretty common and popular. I'm finding it annoying and ...
- 516
1
vote
2
answers
7k
views
What kind of pump do I need for this valve?
This is the valve I have on my bike, but my current pump does not work with it. What kind of pump do I need to buy that will work with it?
- 259
5
votes
4
answers
7k
views
Does a typical floor pump have an integrated one-way valve?
In order for a floor pump to work correctly, something has to make sure that when we pull the pump piston up, the air from the tire does not escape back into the pump. For that there should be a one-...
1
vote
4
answers
777
views
New pump - Topeak |Pocket Shock
I bought this new pump, but i think I made a mistake.
I need it for my road bikes, with presta valves. I don't understand how I connect the pump to the presta.
Is it even possible? do I need an ...
- 245
12
votes
7
answers
18k
views
How to safely remove pump off presta valve?
No matter what I try I can't seem to remove the pump off my threaded presta valve without injuring my hands on my wheel spokes.
I'm beginning to think I'm doing something wrong.
After unlocking, I ...
- 243