On Monday, May 1, 2023 at 1:07:02 AM UTC-4, rbowman wrote:
> On Sun, 30 Apr 2023 11:33:49 -0600, John Robertson wrote:
>
> > Doesn't have to be carbon dioxide but you do need some kind of gadget
> > which is designed to be refilled and which contains enough air in one
> > filling.
> Look around and you can find a 5 gallon portable air tank for about $50. We
> If you don't have a compressor there are free air hoses at some service
> stations or even Lowes.
>
> Unless you have very small tires I doubt the SodaStream cartridge will get
> it up to pressure.

We lived in Germany for a few years. When you wanted air at a gas station, you lifted a small tank off the air station and carried it to your tire. I don't know how much they held, probably about a gallon. Occasionally if you were doing several tires you had to stick it back on and wait for it to pump back up. It was much more convenient than wrestling with a long hose and making sure you parked close enough.

On 5/2/2023 6:33 AM, TimR wrote:
> On Monday, May 1, 2023 at 1:07:02 AM UTC-4, rbowman wrote:
>> On Sun, 30 Apr 2023 11:33:49 -0600, John Robertson wrote:
>>
>>> Doesn't have to be carbon dioxide but you do need some kind of gadget
>>> which is designed to be refilled and which contains enough air in one
>>> filling.
>> Look around and you can find a 5 gallon portable air tank for about $50. We
>> If you don't have a compressor there are free air hoses at some service
>> stations or even Lowes.
>>
>> Unless you have very small tires I doubt the SodaStream cartridge will get
>> it up to pressure.

CO2 liquid expands 535 to 1 as it evaporates at 60 F. Probably half that
to fully pressurize a tire. So, if a tire is 1000cubic inches, you might
need 4cubic inches of liquid CO2. So a SodaStream tank should easily
fill a tire.

https://expeditionportal.com/forum/threads/inflating-tire-cubic-feet-of-air-in-tire-and-in-air-tank-and-psi.162622/