With a name like the Topeak Joeblow Dualie Floor Pump, you just know it's going to push some serious air. And it does. The Dualie is designed for low pressure fat bike tires and for mountain bikes not needing huge pressure numbers. Its oversized barrel is 1.5 times larger than a standard floor pump barrel, allowing it to deliver very large volumes of air to fill oversized tires quickly and easily. This pump works on all valves. Dual gauges are used to handle fat tires (0-30psi), and regular mountain bike tires (0-75psi).
Topeak Joeblow Dualie Floor Pump Specifications:
Materials: 44.4mm steel barrel with composite base and handle
Air release button on Twin Head allows exact pressure delivery
The pump is fantastic for low to mid pressure tires. Using a high pressure (200psi+) pump to inflate high volume low pressure tires to 20psi is inaccurate and slow. This pump pushes huge air volume into large tires quickly. The dual gauges are brilliant. I ride mostly mountain (20-30psi) and cyclocross (40-50psi) tires. The low gauge is super accurate on the mountain tires. I have checked it against handheld gauges and it is spot on. For my cross tires the pressure moves up to the second gauge which again is super accurate for the 30-70 range. The one failure of this pump is the head. It leaks like a sieve. When you put one side on the stem all the air flows freely out of the opposite side of the head. The only way to keep from loosing all your precious pressure is to hold your finger over the open side of the head until you can lock it.
I liked the pump so much I cannibalized a one-sided head from an old pump and replaced the Topeak head. Now it is perfect.
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