co2 pump question

[Mimosa]

Can you give me the brand and model. Not that there is a big chance the sell it overhere, but still.....

I personaly was looking at the SKS Airchamp

[Grog]

The freeze is easy to explain by the laws of physics.

When pressure goes down, so does temperature. (The inverse is also true.)

So as the 16 oz of CO2 that are compressed in the tiny cart get to expand, the pressure in the cart goes down pretty fast. Hence the cold. When I use the carts, I never touch them with my fingers, I think it's cold enough that you could loose some skin there. (If you live in the North you know what I mean!!)

I haven't used them so often, but I never had a perfect fit on the valve, still inflated the tire all right. I'd recommend to everyone to have a pump though, because when your CO2 doesn't work for some reason, well... you're stuck.

[li10up]

The freeze is easy to explain by the laws of physics.

When pressure goes down, so does temperature. (The inverse is also true.)

So as the 16 oz of CO2 that are compressed in the tiny cart get to expand, the pressure in the cart goes down pretty fast. Hence the cold. When I use the carts, I never touch them with my fingers, I think it's cold enough that you could loose some skin there. (If you live in the North you know what I mean!!)

I haven't used them so often, but I never had a perfect fit on the valve, still inflated the tire all right. I'd recommend to everyone to have a pump though, because when your CO2 doesn't work for some reason, well... you're stuck.

I understand why the freeze...just expected all the co2 to go inside the tube...didn't expect the valve to get all frosty. I do carry a mini pump as a backup. I heard it take about 200 strokes to fill a tube with a mini pump and even then you might not be able to get it up to 100 psi. Took about 3 seconds with the cartridge. I'm definitely sold on co2.

[li10up]

Can you give me the brand and model. Not that there is a big chance the sell it overhere, but still.....

I personaly was looking at the SKS Airchamp

That's the one I have!!! I've only used it once but it worked great! There are probably less bulky and lighter ones but this was very easy to use. There are some that just have a head and when you turn it it releases the gas. But I like this one because it has a trigger to it.

Word of caution. When you do go to use it make sure your hand isn't depressing the trigger while you are screwing it together. I let out some of the co2 by doing that...oops. Also, at first I couldn't get it to work. You have to make sure the top is fully screwed on or it won't puncture the cartridge. I think you'll like the pump if you decide to go with it.

[Mimosa]

Owh cool , then I probably will get one in the near future to give it a go.