2 of 3
Portable Compressed Air Tank Sizes
The compressed air carry tanks come in different sizes measured in gallons of compressed air. Typically you'll find odd numbered sizes of 5 gallon, 7 gallon, 9 gallon, 11 gallon and so on. I'd recommend a 9 to 11 gallon size for household uses like filling car tires and smaller 5 to 7 gallon sizes if you're space constrained like in an apartment and are just using it for filling bike tires, etc. Depending on the size you select, they will weigh between 15 to 30 pounds but are still light enough that you can easily carry the tank to wherever you want its use.