The Topeak Mountain DA Bike Pump delivers fast, effortless tire inflation for MTB and fat bikes thanks to its oversized aluminum barrel and Dual-Action (DA) technology, which doubles air volume on every stroke. Compatible with Presta, Schrader, and Dunlop valves, this versatile mini pump handles up to 60 PSI and includes an integrated dust cap to keep the pump head clean. Built from durable aluminum with a secure thumb lock lever, it ensures an airtight seal during use. Compact and lightweight at only 4.44 oz, it mounts easily to your frame with the included side bracket—perfect for trailside repairs and adventure rides.