Originally Posted by ZenRen

I have a Genuine Innovations pump, that uses CO2 canisters (non threaded). It's the kind where you put the canister into the handle, then screw the head onto it, which punctures the tube, and theres a trigger to start the air.

Anyway...the canister looks exactly like a CO2 canister used for airguns/rifles, can I use these canisters? I think the canister for the bike inflator is 16g...i dont know what size the airgun/rifle canisters are. If I can't use these, are there cheaper alternatives I can use?

I think the bike shops mark up those CO2 canisters like 400%