Some pump heads won't fit onto the fill valve due to the recessed design. I was able to add a valve extender so that it can be accessed with my Lezyne pump head. After that problem was solved, I was able to use this to seat my tire without difficulty. Not as powerful as having a compressor, but I take this along on road trips and races as part of my tool kit. For the price of this canister + a pump, however, I would buy a 2-in-1 pump/charger unit like Topeak and Bontrager make.