co2 cartridges for puncture repair

[DaveK671]

Any had experience using these? Im interested to know how much PSI a canister will give from a dead flat tyre. Not much use if they only add 10psi using 3 canisters when you have a fully loaded bike + pillion to ride with. Would be adequate if it added 25psi or so, enough to get to a garage etc.

Ideally id buy a compressor but they seem a tad expensive, or carry a footpump but space is scarce with a woman on board lol.

Cheers, Dave

 

[Farmer Palmer]

Pssssttttttt!

I used a cartridge the other day on my HP2 front tyre(90/90-21) I reckon it would have taken at least two cartridges to get the tyre back up to normal pressure!

I do have a handpump which is fine but a lot of work(at least 150 pumps) The electric compressor is very good, quite small and not too heavy(Hein Gericke £17 about five years ago) which I forgot to pack on that day.

Turned out to be a leaky valve on my front tyre but i've put Ultraseal in now aswell just for extra peace of mind.(it's the first time i've used it)

FP.

 

[cookie]

pikey dave and myself did an experiment on flat rear tyre on his 1150.

IIRC 1 cartridge got to about 8psi, 2 to 18, and 3 to get it near 30. so one would definitely get you out of the shit, but more's better

 

[Greg Masters]

Ideally id buy a compressor but they seem a tad expensive

£8.64 delivered to your door

You can usually find them cheaper at Morrisons, Pound Shops etc etc.

How much do you want to pay?

Greg

 

[cookie]

£8.64 delivered to your door

You can usually find them cheaper at Morrisons, Pound Shops etc etc.

How much do you want to pay?

Greg

go and see a garage that sells jap import 4x4s. many have those little compressors in the back and they get slung out. ditto snow chains

 

[Taff]

pikey dave and myself did an experiment on flat rear tyre on his 1150. IIRC 1 cartridge got to about 8psi, 2 to 18, and 3 to get it near 30.

That would tie in with what a mechanic told me. He reckoned 1 gas cartridge = 10psi approx. Depends on the size of the tyre I suppose.

I wouldn't like to rely on the really cheap compressors. I had one but it literally shook itself to bits one day, luckily while I was at home. Halfords did a smallish one, which seems far better quality and cost approx £13 IIRC.

 

[Greg Masters]

I wouldn't like to rely on the really cheap compressors.

I assumed that we're talking brand new out of the box and one-time use (just as you would a CO2 cartridge). Even the cheapest 12v pump ought to be good for that!

Greg

 

[DaveK671]

didnt realise you could get compressors that cheap, sorted, cheers.

 

[Taff]

I assumed that we're talking brand new out of the box and one-time use (just as you would a CO2 cartridge). Even the cheapest 12v pump ought to be good for that!

Agreed. Apart from changing the plug, there was no problem for "out of the box" use. In fact people commented for a year or 2 how useful it was and I kept it in the panniers all the time - as anyone would. But it gave up without any warning - luckily for me I wasn't abroad, it wasn't dark and I wasn't stood in the rain with a flat tyre.

didnt realise you could get compressors that cheap, sorted, cheers.

IIRC mine cost me £5 off e-bay. Last of the big spenders eh? The fact is that when you need these, its pretty important (lets face it, you don't pump up tyres for fun) so I splashed out on a £12 Halfords one. It's slightly bigger than the £5 one, but still fits in neatly into a TT pannier. If I get the chance I may even take a quick photo of it.

 

[(RIP) Bin Ridin]

CO2 cartridge relies on getting the puncture fixed first time. I have had a few where plugs have had to be added (record is 6 plugs in one hole). Compressor is your only hope.
bin

 

[Pukmeister]

For cheap CO2 cartridges, try a home brew shop or cycle repair shop (Halfrauds). I got four for a fiver (from a mountain bike shop) to replace the ones I used on a mates Ducati whilst in Australia.

 

[Steptoe]

That would tie in with what a mechanic told me. He reckoned 1 gas cartridge = 10psi approx. Depends on the size of the tyre I suppose.

You'll be lucky to get above 25psi no matter how many cartridges you use -
At 25psi it equals the cartridge pressure so you ain't gonna get any more air in the tyre

 

[DaveK671]

Ive ordered a kit with co2 cartridges that i can keep under the seat for days out for emergency. And ill get a compressor or footpump for touring.

 

[nick.ct]

You'll be lucky to get above 25psi no matter how many cartridges you use -
At 25psi it equals the cartridge pressure so you ain't gonna get any more air in the tyre

I dont think so.................... more likely to be many hundreds of psi. A single one is certainly capable of inflating bicycle tyres to over 100psi

 

[Steptoe]

I dont think so

What is the capacity of air in a push bike tyre. You can blow a pushbike tyre up using lung power ...

Try it on your BMW tyre and see what you get ( i have) . Then please post back .

 

[nick.ct]

What is the capacity of air in a push bike tyre. You can blow a pushbike tyre up using lung power ...

Try it on your BMW tyre and see what you get ( i have) . Then please post back .

Next

You must have a fine set of lungs to get even close to this

http://www.aerotechnic.com/co2.htm

 

[Steptoe]

Next

You must have a fine set of lungs to get even close to this

]

I won't go through the whole laws of capacity, expansion and square area. I'll keep it simple in a child like explanation.

Give one big blow into a push bike inner tube, it will take shape as you understand an innertube to look like, but will be soft. You can blow again and get it fairly firm.

Now give one big blow into a motorcycle inner tube. Keep on blowing for hours until it gets it's shape. But you'll never get it firm because the innertube pressure/capacity will be greater than your lungs before it gets firm.

Same with CO2 bottles and a motorcycle tyre. The pressure the small bottles available is finate, to about 25psi absolute max in a motorbike tyre before total capacity of the tyre overcomes the pressure from the cartridge ..