compressor or hand pump?

[Steptoe]

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Even the website that Paul Young suggests estimates 32 psi for a rear tyre using FOUR cylinders.

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You can't get 32psi from using the standard bike air cartridges - no matter how many you attempt to put in/use, after 2 and a half cylinders the pressure in the tyre will equal the pressure in the cylinders so will not inflate any higher.

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This is less than the one up pressure specification of a GS and almost low enough to be illegal.

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I didn't think there was such a thing as an illegal tyre pressure
If you want to lower your pressure to go of raod or to suit the conditions thats down to you. How can a law decide that for you

 

[Paul Young]

Sorry Andy, I meant to put a nice smilie after saying you were wrong... Didn't mean to be rude I grant you, that we were on off-road bikes running about 20PSI but, from the site I linked to:

Will fill:
1 x Road Bike 27" tyre to 130PSI/9BAR
2 x BMX 20" tyres to 30PSi/2.1BAR
1 x Mountain Bike 26" x 2.1" tyre to 40PSI/2.7BAR
4 x 16gm will fill Motorcycle 180/55/17 tyre to 32PSI/2.2BAR

This would indicate that the cartridge pressure "can" inflate to 130PSI. At 70 degrees F, CO2 obtains a gas pressure of 852.8 psi when confined in a vessel & is a refrigerant gas. That means it cools when it expands by flashing from liquid to gas, so you know the stuff inside the cartridge is moving from liquid to gas, because it gets covered in ice. The motorcycle tyre comment indicates 4 cartridges = 32PSI, but the addition of a 5th would take it up further.

A lateral thinker might use them to start off whatever compressor/hand pump you've got &, once you're mobile again, go & use an airline when you put petrol in... It's all a matter of preference, situation, cost, space, etc... but I've seen them being very handy & fulfilling their purpose very well.

 

[brassmonkey001]

What about using a CO2 cartridge meant for pressurising homebrew kits or paintball guns? They have a larger capacity but are they at a higher pressure than the little ones?

 

[Twotter]

I've had a slime pump for a few years now and it's a great bit of kit

 

[ILMV]

What about using a CO2 cartridge meant for pressurising homebrew kits or paintball guns? They have a larger capacity but are they at a higher pressure than the little ones?

Would have to fit a regulator to that bad boy, unless you want your tyre innertube exploding in your face

I say this because a paintball canister will run at anywhere upwards of 3000psi

 

[Steptoe]

I say this because a paintball canister will run at anywhere upwards of 3000psi

It's the litres capacity that matter. Not just the PSI.

Could be 10,.000 PSI but only an eggcup full of capacity.

 

[London Mole]

I've had a slime pump for a few years now and it's a great bit of kit

My "Slim" NippyN's mini-compressor cuts-out after a few seconds, I am using it as instructed by the manual, that's with the bike's engine OFF.

Am I being slow, am I supposed to have the engine running as I use the pump???

 

[Beemerman59]

My "Slim" NippyN's mini-compressor cuts-out after a few seconds, I am using it as instructed by the manual, that's with the bike's engine OFF.

Am I being slow, am I supposed to have the engine running as I use the pump???

Are you using the OEM accessory socket? If yes, there's a 5 amp limit and the Slime uses more than that so it will cut out. You need to connect the Slime direct to the battery with the croc clips etc or fit an accessory socket direct to the battery as I have.

 

[andyclift]

+1. Fitted aux socket on beak straight from battery. Needed for pump, heated jacket and mains inverter