Like an air compressor, but quieter.
The latest in a series of pumps designed to aid in tubeless tyre inflation, Topeak’s JoeBlow Booster is designed to deliver the sort of high-pressure shot needed to seat stubborn tubeless and tubelish tyres. The Booster carries a high-pressure chambre, which the rider “charges” to 160psi and then releases into the tyre all in one shot.
Tubeless tyres and rim profiles have improved greatly over the past decade or so, but we still run across combinations that need more oomph than a standard hand pump can deliver. If it works, it’s a great idea for those put off by the expense of a full-blown air compressor or seeking something that can be brought along to events or on road trips. The JoeBlow Booster’s high-mounted gage and hose are always welcome, making reading easier on aging eyes and allowing the chuck to reach wheels on bikes in work stands. The only downside might be in discerning 21 from 23psi on the high pressure gage.