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Birzman's new Sheath Apogee pump incorporates a CO2 inflator into the pump design. If you have CO2 cartridges, you simply unthread the inflator from the pump, inflate your tire as much as you can, and then reattach the inflator head to the pump to complete the inflation process.

The head of the pump uses Birzman's clever Apogee design which accommodates both Schrader and Presta valves.