Dual-Action Bike Pump with Oversized Aluminum Barrel Effortlessly inflate large-volume mountain bike, fat bike, and MTB tires with this high-performance pump featuring a 60 psi capacity and an oversized aluminum barrel. The Dual-Action (DA) mechanism doubles the volume with each stroke, allowing you to inflate tires up to pressure quickly and efficiently. It supports Presta, Schrader, and Dunlop valves for versatile use. The integrated dust cap keeps the pump head clean, while the thumb lock lever ensures an airtight seal. The side mount bracket provides convenient storage for on-the-go cycling adventures.