Puncture!

[CanucksTraveller]

........It went down again - he'd missed a second piece of glass...
and then....
...........He'd trapped part of it between the tyre beading and the rim.

But that's sloppy repair drills which you can't really blame on the CO2.

Either way, you're advocating that a pump is best which there are definately strong arguments for, and I won't disagree, but it still doesn't explain why the previous poster carries both. Either or, surely?

 

[ColinJ]

But that's sloppy repair drills which you can't really blame on the CO2.  

Either way, you're advocating that a pump is best which there are definately strong arguments for, and I won't disagree, but it still doesn't explain why the previous poster carries both.  Either or, surely?

What I'm saying is that if you carry 'n' cylinders but suffer 'n+1' punctures, then you are stuffed without a pump. I've had 3 punctures in one ride before now. It's rare, but it does happen. I've had 2 in a ride several times. 

If a cyclist wants to do without a pump, how many cyclinders should (s)he carry? I'm assuming that each cylinder only does one inflation, though it may be possible to buy bigger ones with 2 or more tubes worth of gas in. If you could buy a cylinder good for 3 tubes and carried 2 of them, then that should be okay!

 

[CanucksTraveller]

Yeah I can see the flaw in CO2, it goes without saying that at some point it runs out. Personally I carry 3 cylinders, one tube, and 1 repair kit. I only opted for CO2 because I couldn't really find anywhere to mount a pump (bottle cages get in the way) and CO2 cylinders fit in my repair bag.

So yes I can see the reasoning behind being a pump fan, but my abiding point is that I'm unsure why someone would carry a pump AND then a load of CO2 on top of that. Surely if you can afford the room to carry the pump, then you're already good to go. Or is it a case of belt and braces in case the pump fails?

 

[ColinJ]

Or is it a case of belt and braces in case the pump fails?  

Aaargh, I hadn't considered failing pumps - now you've got me worried!

 

[theloafer]

got one of these great little pump... http://www.wiggle.co.uk/lezyne-pressure-drive-mini-pump-medium/

 

[cameramanjim]

I only opted for CO2 because I couldn't really find anywhere to mount a pump (bottle cages get in the way)

Some pumps use the same mount as the bottle cages, so don´t get in the way. This one for example: http://www.wiggle.co...rive-mini-pump/

I suspect some people carry CO2 & pumps because the CO2 is quicker, but if it fails or runs out they can use the pump as backup.

 

[screenman]

We are a cycling family and a lot of the local cyclist know my house, I can think of 3 occasions where people have walked up the drive with a non working pumps. So to carry both seems a good idea.

 

[airbrake]

The Specialized double-shot pump I bought around 10 years ago inflates narrow tyres pretty quick and is convenient to carry. Before buying I asked if it was re-buildable, and was told "nah, you just throw it away and buy another".

After a few years it was difficult to get high pressure, so I took it apart and replaced the O ring - back to new and still going strong.

 

[Fnaar]

I have one of these on the roadie... excellent, but thankfully have only had to use it twice... and one of those was just to try it out when I got it.
http://www.wiggle.co...rph-with-gauge/

Also have a track pump (at home, from Halfords). After a spell a few years ago of getting more than my fair share of p*nct*res, someone on here suggested I get a pump with a guage and inflate more than I was doing... since then... only the one flat!

 

[decca234uk]

I use the topeak pum, it's perfect, small light and gets air in fast. At the end of the day if you're just out on a training or riding for the fun of it and you get a puncture there's no necessity to repair it like a formular one mechanic team. My stratergy is to curse the road, curse the tyre, sulk for a few minutes and then just get on with it, it takes however long it takes. Any pump will do for me as long as it's small enough to carry. I've never tried compressed air, keep meaning to though.