First-class and compact mini pump for mountain bikes with impressive features. The Alloy Drive S is the smaller version of the Alloy Drive pumps and weighs only 112 g. It operates very smoothly, offers precise guidance, and has a stylish design. The CNC-machined aluminum construction ensures a lightweight design. A rigid, extra-large piston guarantees stability and long durability. The compact, refined design provides over 30% more stroke compared to conventional hand pumps. The ABS (Air Bleed System) flexible hose protects the valves and can be easily stored in the pump housing. The flexible hose simply screws onto Presta valves. By pressing the ABS button, air pressure can be released from the pump hose, making it easier to remove the Flip-Thread Chuck from the valve without losing air. When using Schrader valves, tire pressure can be adjusted by pressing the ABS button.