CO2 Tire Inflation Chart
This chart provides the approximate pressure that will be achieved when inflating a tire using the most common sized Carbon Dioxide (CO2) inflation cartridges. Please note that these values are approximate, and will vary due to several factors including differences between tire manufacturers, ambient temperature, altitude, etc.
Please also note that CO2 molecules are smaller than air molecules, and will therefore permeate though both butyl rubber and latex rubber innertubes faster than air molecules. It is common for tires inflated with CO2 to be underinflated within 24 hours.
| Tire size | 16 gram CO2 cartridge | 20 gram CO2 cartridge | 25 gram CO2 cartridge |
| 700C x 23 | 130 PSI | 80 PSI per half cartridge | 90 PSI per half cartridge |
| 700C x 25 | 110 PSI | 135 PSI | 150 PSI |
| 700C x 28 | 90 PSI | 110 PSI | 125 PSI |
| 700C x 35 | 60 PSI | 70 PSI | 80 PSI |
| 700C x 40 | 40 PSI | 45 PSI | 50 PSI |
| 20" x 2.0" | 50 PSI | 60 PSI | 70 PSI |
| 24" x 2.0" | 40 PSI | 50 PSI | 60 PSI |
| 26" x 1.95" | 30 PSI | 40 PSI | 50 PSI |
| 26" x 2.0" | 25 PSI | 35 PSI | 45 PSI |
| 26" x 2.5" | 20 PSI | 30 PSI | 40 PSI |
| 27.5" x 2.0" | 24 PSI | 32 PSI | 36 PSI |
| 27.5" x 2.25" | 22 PSI | 26 PSI | 32 PSI |
| 29" x 2.0" | 30 PSI | 42 PSI | 46 PSI |
| 29" x 2.5" | 25 PSI | 30 PSI | 35 PSI |