The joeblow booster pump just made it easier to install tubeless tires no more frustrating leaks because you cant pump up your tire fast enough to get an effective rim seal this pump has an integrated aluminum air chamber that stores an air charge of one liter up to 160psi 11bar to quickly fill your tires and insure the proper installation on a tubeless rim once the tire is mounted you can turn the selector from charge to inflate mode to pump air directly into your tire and fine tune