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Questions tagged [pump]

Bicycle pumps pump air into tires and suspension forks.

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52
votes
14answers
60k views

What are advantages and disadvantages of CO2 inflators over frame pumps?

I have a frame pump that I've used on the road when replacing flats, but I always see CO2 inflators advertised at bike shops. Are they worthwhile for the potential weight savings?
23
votes
7answers
173k views

Can I use a gas station air pump on a bike tire?

Someone pointed out that it may be risky, and it might not have the right kind of nozzle, but I don't have a bike pump at the moment. Does anyone else ever do this?
21
votes
1answer
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 ...
12
votes
9answers
217k 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 ...
12
votes
2answers
353 views

Buying a CO2 tyre inflater

I am thinking about buying a CO2 tyre inflater. I have never used one before and have 3 questions: Do they have enough pressure to get a road tyre up to full pressure (~100psi) When you use a ...
11
votes
1answer
606 views

Using a schrader pump on a presta valve

I have a JoeBlow Sport (not a Sport II or Sport III) It head defaults to schrader style. There was an adaptor in the box which I thought was a presta adaptor. I tried sticking that adaptor in the ...
11
votes
4answers
477 views

How to know a good pump?

It's painful to pay the local price of 15-30€ for a pump that is "very good, durable and small". To me, it is just consumable that I will use until it breaks, so I have no interest in investing ...
11
votes
2answers
2k 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 ...
10
votes
7answers
12k 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 ...
10
votes
1answer
5k views

How to disassemble a Topeak JoeBlow Sport II

OK... I searched everywhere, could not find a definitive answer. I've had the pump a few years and use it a lot on several bikes. I like my pump and want it to last as long as possible and I'd ...
10
votes
2answers
2k views

Is a seat post with an integrated pump a good idea?

I saw this http://www.premiumbikegear.com/biologic/convenience/postpump-seatpost.html and thought it seemed like a cool idea. But if it was really such a great idea, I would have expected to see more ...
9
votes
5answers
7k views

What happened to pumps?

I'm an old-time bike rider who commuted to grad school every day for 3 years on a bicycle. Then after a 20+-year-long hiatus, started riding again with my son. I cannot figure out the fitting on the ...
8
votes
2answers
3k 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 (...
8
votes
1answer
2k views

How do tire pumps work?

How does a pump push air into the tire and take in air from somewhere else? Why doesn't air spill out from the edges of the hole where the long thing goes in and out of the tube? I'm a complete noob ...
8
votes
4answers
1k views

What is the best floor pump?

I'm looking for a pump at home to use with my high pressure (100-120 psi) road bike tires. My bike has presta valves, but I would like to be able to use it on Schrader valves, should I get a bike ...
7
votes
3answers
3k views

Why does my floor pump only fill a presta valve tire after a pop sound?

I have had a generic floor pump from an online bike catalog company for years, and have filled many Schrader valve tires with it without any problems. I have recently started to use Presta valve ...
7
votes
3answers
15k views

Could I be pumping up my tyres the wrong way?

I now have my first road bike. When I am pumping up the tyres with what seems like a sturdy pump (that you stand on and push with two hands), I can barely get to around 100 psi, even putting my back ...
7
votes
3answers
9k views

Is it normal for a presta valve to unscrew into two pieces?

I have a Continental Road inner tube with a threaded presta valve. I also have a threaded bike pump which I screw onto the valve to inflate the tube. When I try to unscrew the pump, the uppermost ...
7
votes
1answer
3k views

How does a double-headed bicycle pump work

I have a pump with a presta fitting on one side and a schrader fitting on the other side. If I leave the pump unattached to anything and work the handle, air squirts out both orifices. But if I put my ...
6
votes
3answers
1k views

Floor pump blowing wet air?

I have a Lezyne Sports Drive floor pump. It has worked fine for a couple of years, and it lives in my garage. The handle is stored in the down position, so the cylinder is mostly empty. The pump ...
6
votes
2answers
2k 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 ...
6
votes
2answers
829 views

What is the lever on the head of my floor pump for?

I have a Wrench Force floor pump. There is a lever on the head of the floor pump which can be moved into one of two positions. What is this for? The pump automatically selects the correct valve and ...
6
votes
1answer
38k views

how to use “smart valve” pumps?

i got one floor pump with a so called "smart valve". it came with no instructions whatsoever. and I'm not smart enough to use it... I tried it on both type of tire valves, and no matter what i do, it ...
6
votes
1answer
3k views

How does a double effect pump work?

I have just bought a double effect hand pump (a BETO CLD-024NAG) without knowing what to expect. I was very surprised to discover that the pump inflates the tire both when I push and when I pull. How ...
6
votes
5answers
8k views

How can I properly replace the hose on this older Schwinn pump?

I have the following Schwinn bike pump. It’s pretty old, perhaps 30 years or more. I like it a lot. Some years ago, I changed to Presta valves; for this I needed a new head. I got a Topeak SmartHead ...
5
votes
6answers
6k views

What is the easiest and quickest way to pump up a tyre?

I find that I need to pump up my tyres at least weekly and am looking for how to make this quick and easy. So what is the easiest and quickest method of pumping up a bike tyre? As an example, I ...
5
votes
3answers
14k views

Can I use a shock pump to inflate a tube?

I know that shock pumps are meant for high pressure applications so that they can withstand high pressures needed by suspension shocks. However, can I use a shock pump to inflate my tire in a pinch ...
5
votes
4answers
268 views

Are there any mini pumps that can be mounted on a wide rectangular frame?

On my previous MTB (a hard tail from 2002), I had mounted a mini pump (not sure which brand) under/next to the bottle cage. The pump came with a frame mount and a velcro strip to secure it in place in ...
5
votes
5answers
2k views

How to mount a compact pump onto a full-suspension frame?

Many FS mountain bikes have a weird shaped seat tube. I have managed to strap tube to the bottom of the down tube with electric tape, but am now struggling to purchase and mound a small pump. As is ...
5
votes
3answers
1k views

Is my pump faulty or my tyre?

I have recently bought a Specialized women's road bike and for the last couple of weeks was borrowing my boyfriend's hand pump with no real issues. Last night I finally purchased my own (Topeak ...
5
votes
2answers
16k views

Mini Pumps For Roadbike (120 psi)?

I'd like to buy a mini pump to keep in my bike bag, but I have some doubts if these pumps are really that usable. My current pump is rated at 90 psi, but I would be surprised if it does 60. For ...
5
votes
1answer
405 views

How to clean sealant stuck in pump head?

I have a old trusty pump that over the years has the presta head filled with tubeles goo. Noways it pumps the tires very slow. Is there any chemical way to remove it without melting the plastic?
5
votes
1answer
3k views

What kind of portable pump should I carry when riding on a fat bike?

However, I just got a fat bike with 4.5in tires. I know that my portable hand pump takes a long time to pump mountain bike tires due to it being optimized for high pressure / low volume. What type of ...
5
votes
2answers
5k views

Pressure gauge on my pump stuck at one value, what is wrong?

I have a Specialized Switch Hitter I have used for several years on both Presta and Schrader valves. Recently, my wife tried to inflate her tubes (Schrader valve) and could not get the pump to ...
4
votes
8answers
759 views

What makes a good floor pump?

There are so many options, mainly because of the own-brand alternatives. So how do I choose a good floor pump? What should I look for?
4
votes
3answers
27k views

What do I do if my bike won't pump with an air pump at all?

My bike tires will not pump up at all. I tried forever. I had this bike for a year and then it won't pump at all. I have a pump you stand on and use your 2 hands to pump. At first it was pumping air a ...
4
votes
1answer
224 views

What valves are these?

What valves are these, and why do each wheel have its own type?
4
votes
4answers
5k 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-...
4
votes
2answers
4k views

Can I zero the gauge on my floor pump

I ordered a zefal husky pump, and it just arrived today. I am pretty excited about it. (Who doesn't get excited about pumps?) The downside is that the gauge is reading ~50psi instead of ~0psi I ...
4
votes
3answers
3k views

Are there any generic hose extensions for frame pumps?

I see two kinds of portable frame pumps to carry with me on my riding: Pmps that have a flexible hose that is either integral or pulled out and/or screwed on (e.g. Topeak Road Morph, or Lezyne). The ...
4
votes
1answer
4k views

How to correctly use an Avenir Airsource One bicycle pump

I have an Avenir Air-Source One pump that keeps popping off while trying to inflate the tires. can someone tell me how to correctly inflate the tires, without the pump popping off?
4
votes
1answer
1k views

Fix a broken floor pump, replace pump head

The little plastic lever to tighten the o-ring broke on my floor pump. It's probably fifteen years old. The model is a Pyramid Pro. The broken bit is highlighted in red. There's nothing else wrong ...
4
votes
1answer
660 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 ...
4
votes
1answer
1k views

Am I unscrewing my pump incorrectly?

I just bought a new mini pump (with a foot-stand and pressure gauge to get up to about 100psi), however, in order to get a good seal you have to screw the pump-head onto the valve. The issue is, ...
3
votes
3answers
3k views

Air compressor to fill up to 60 PSI

I am looking for an air compressor and wish to get one which is not under or over powered. I am looking at one in a catalogue which has the following attributes: 40 Litres/min free air delivery 1hp ...
3
votes
3answers
323 views

How do I know when it's time to pump up my tires?

I've been cycling for several months now. However, I have had the misfortune of having two bicycles stolen from me, so I've never had a single bicycle for more than a few months. With time passing, I'...
3
votes
2answers
647 views

Brompton pump mount?

I have recently acquired a Brompton, which came with this zefal pump, which doesn't clip onto the frame: The rear frame on my Brompton doesn't appear to have the cage-like mounts that new models have....
3
votes
2answers
88 views

Pump for small tires

What is the best pump for small bike tires with narrow spokes? The pump head we have is large and is hard to place over the valve on our 20 inch tire. I've tried pump extenders but they are screw ...
3
votes
1answer
740 views

How do I attach this pump head to my Schrader valve?

I am such an idiot, but I can't figure out how to attach this pump head to my Schrader valve. The lever doesn't seem to flip up??
3
votes
1answer
1k 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,...