The lezyne co2 cartridges are a new standard of threaded co2 cartridge perfect for whether your going on tough mountain range rides or in need of fast air pressure during hot pursuit racing with the 16g threaded cartridges it can fill a 700c road tire to 120psi 83bar or 26 mtb tyre to 30psi 21bar in a single shot now thats impressive presta threaded valves only