BTW, having a co2 cannister on a bike... is asking for someone to die. This isn't LPA like the Shimano Airlines... you are strapping something to a bike that literally can kill a rider, or a spectator with ease. Probably the stupidest idea ever. Take it from people who have been working with co2 tanks and LP Regulators for years. You might as well put some old school nitroglycerin on your downtube and ride it.