The Topeak JoeBlow Booster is updated with a new nozzle. We've contacted the manufacturer to find out if any other changes coincided with the redesigned nozzle.
By turning a thick plastic dial (that surrounds the gauge at the top of the pump), this stored air can be released in a single blast of air to snap the bead of a tubeless tire onto a rim. Once the bead is set, air can be easily added to the tire in the same manner as a traditional floor pump. Likewise, an air release valve allows air to be bled directly from the tire with the push of a button. The pump looks heavy-duty and is very well built, with metal incorporated wisely on highly used and abused components, like the steel base and the lever on the SmartHead, which automatically adjusts to fit Presta or Schrader valves. Where plastic is used, it is robust and thick, giving the pump a look that begs you to toss it into the truck bed with abandon. In the past, we've tried numerous tricks to seat a tubeless tire using a regular pump or a CO2 cartridge. Most often we were left sweaty, frustrated, and on our way to the local bike shop. With only one exception, we successfully seated a wide array of tubeless tires quietly, at home, without using any electricity. We found this pump to be an excellent addition to our kit and it now serves as our primary pump at home and on the road.