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15 votes
3 answers
21k 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 ...
David Tuite's user avatar
7 votes
3 answers
26k 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 ...
Benzo's user avatar
  • 18.3k
6 votes
3 answers
3k 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 ...
Suzy's user avatar
  • 91
5 votes
6 answers
12k 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 ...
Valamas's user avatar
  • 865
4 votes
3 answers
33k 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 ...
Ranasia Clark's user avatar
4 votes
3 answers
5k 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 ...
Valamas's user avatar
  • 865
4 votes
2 answers
923 views

Tires not holding air at high pressure

I ride a Trek road bike with 25c tires. The recommended pressure on the tire is 100-130 psi. Before I ride I inflate the tires to close to the max pressure no problem and my pump works fine. But ...
Adam's user avatar
  • 141
3 votes
2 answers
352 views

Is it risky to often use an air compressor because of potential for valve damage?

I always use a bicycle shop's air pump about once a week because it is free and convenient however about a month ago when filling in I found that valve was leaking. I went in got it fixed- quick cheap ...
user2617804's user avatar
3 votes
2 answers
4k views

Can I approximate how much air pressure is lost from disconnecting the hose?

I have a floor pump intended for mainly rather low pressure tires. It lets out quite a bit of air from the hose when disconnected. Can I calculate (approximately) how much air pressure is lost by ...
JBeurer's user avatar
  • 173
1 vote
2 answers
337 views

I can't inflate tire. Should I look for another pump?

Hello to everyone in the community. I used to own a mountain bike which used 26" tires and I was able to inflate them after changing the tube while on the road. It wasn't perfect but allowed me to ...
carlos palma's user avatar
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?
David's user avatar
  • 111