Because "Free Air" signs at gas stations equal blown tubes.

Features

• Hi-volume and hi-pressure switches for efficient pumping
• Super simple, thread-on HeadMaster Presta and schrader compatible head requires no disassembly
• Extended hose for ease of use
• Flip down aluminum foot petal for added stability while pumping
• All aluminum barrel
• Pumps to 120 psi
• Fully rebuildable internals and head