Bicycles Stack Exchange
Bicycles Stack Exchange

Questions tagged [pump]

Bicycle pumps pump air into tires and suspension forks.

Bicycle pumps pump air into tires and suspension forks. There is a wide range of styles from hand pumps, CO2 pumps, to floor pumps. There are also a variety of 'valves' (see tag) and valve attachment systems.

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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 pump small side (screw side) toward the pump, other…
gman
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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 thumb gently over either hole, the pump…
Penguino
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Will this electric air pump suit my tires and work for me?

I have to buy air pump for bicycle, I saw this one online on Walmart. My bicycle tires have a pressure range between 30 and 50 psi. Will this pump work, or should I buy mechanical one? What are it's drawbacks?
TAHIR SADIQ
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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 to pumps.
clickbait
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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 modern pumps. I can get some air in, but after…
pterandon
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What is the difference between hand pumps for road bikes and mountain bikes?

I realise that hand pumps seem to be road or MTB specific, but what is the difference between these pumps? I am looking for one to pump up my road and my mountain bike.
Charlie
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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 does it work? Also, the barrel of the pump is at…
pintoch
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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 example, this one claims 160 psi, I doubt it: Pumps I…
dan
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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 wouldn't mind if it was off by 5psi or so, but this is…
Darth Egregious
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Pumps keep breaking

I've now had two floor pumps 'break' in use, a Beto and a Vandorm, the latter on the first use. Both are dual Presta-Schrader. Both 'broke' while attempting to inflate a Vavert 700X28/35C Presta inner tube in a Continental Ride Tour 700x28C tyre.…
mjc
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EVO Hurricane Bicycle Pumps - how to remove the plunger?

Most bicycle pumps have screws or twist off the top to remove the plunger, but these Evo Hurricane pumps have a very odd collar with no embedded screws unlike others (see below). Anybody know the proper way to get the plunger out without destroying…
Chris Parker
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The pump needle broke off, leaving the base in the nozzle. How to remove the stuck base?

I was using this bicycle pump to inflate a ball. I inserted a needle pin to the nozzle, but the needle broke off after trying to insert it into the ball. The base of the needle pin is now stuck in the nozzle. What is the best way to remove the stuck…
David
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Pump head suitable for 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 on and I always let out as much air as I put in…
Marcus Leon
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What size are the replacement o rings in the prestacycle set?

https://www.crosslakesales.com/products/prestacycle-prestaflator-tool-rebuild-kit-o-ring-new I asked the company that manufactures them, they said they didn't know. Does anyone know the sizes? I ask because the set is not available in the UK. Flying…
Ne Mo
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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?
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