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Pumping up a flat is great if you're working on your forearm muscles, but if you just want to fill up your tire and get going, a cartridge from the Portland Design Works CO2 3-Pack's a better way to go. Each cartridge will fill up a road or mountain tire enough to get you home, and they're compatible with standard CO2 inflators.

  • Three CO2 cartridges

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Portland Design Works CO2 3-Pack

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Here's what others have to say...

5 5

Works-like they should

  • Familiarity: I've used it several times

Hard to get excited about CO2 cartridges, but these work and are fairly priced. Here's a hint: I found that when you flat in 90 degree heat and are dripping with sweat, anything you can do to help the situation is valuable. These cartridges(all brands) are slippery. I take a short length of old tube and slide over the cartridge (23 is tight so you may have to lube cylinder with a little liquid dish detergent). Now you'll have a better grip to tighten the cartridge into your inflator head AND it insulates you from the cold as cartridge discharges.

Works-like they should