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How many psi does a 16 g CO2 get in a 700 x 23C tire? nm(6 posts)

How many psi does a 16 g CO2 get in a 700 x 23C tire? nmBowWow
Oct 11, 2003 6:05 PM
110 psi. (nm)Zonic Man
Oct 11, 2003 6:17 PM
16 g cartridges will get you where you need to be...Uncle Tim
Oct 11, 2003 6:21 PM
...but you can get by on the cheaper 12g cartridges. I'm guessing they'll get you to 95-100 psi.
I wonder if there is more to it than just cartridge size...Matno
Oct 11, 2003 9:02 PM
The only time I've ever used a CO2 pump, I pumped up a 700x23 Serfas tire to around 100 psi with a 12g cartridge. Unfortunately, there was more than just a hole in the tube and I flatted again. I was quite surprised when the same cartridge filled up the tire a second time! This time it was probably only about 75 psi, but still more than adequate to ride home on. I swear these tires are exactly the same size as any other 700x23 tires I've seen or used. Go figure.

Of course, ever since then, I always carry a spare cartridge...
I wonder if there is more to it than just cartridge size...russw19
Oct 12, 2003 3:23 PM
When the tire and CO2 reach equal pressure, the flow will stop. Even if your CO2 cartridge held enough CO2 to put your tire to 150 psi if you could empty the contents, you could never get that high. Once the pressure between the two systems is equal, the transfer stops.

So if enough CO2 the first time equaled the pressure in your tire and CO2 cartridge at 100psi and there was enough to get it the 2nd time to 75 psi in each, you may have gotten a third to say 40 psi... and so on. But you would never be able to get more than the equilibrium pressure at any given time.

Russ
about 125 psi, in my experienceDougSloan
Oct 13, 2003 6:26 AM
If it all goes in, about 125 psi. However, CO2 seems to leak out of the tube faster than air, so a little higher pressure to start with isn't all that bad.

Doug