Gonfleur is French for "inflator". It's used to describe foot pumps, floor pumps, small compressors etc.

In old bike photos (in the era of steel bottles with corks, sew ups over the shoulders, and handlebar bottle cages) you can see riders carrying a gonfleur on their frame, usually below the downtube like here:



So I think the way these things work is they store compressed air, not CO2. I think they're bigger than CO2 inflators because since it's compressed air it's not liquid in the canister. But I've never seen one in real life.

Please tell me anything else you know about these gonfleurs.
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