The Crankbrothers Sterling S Midnight Edition embodies the pinnacle of innovation in the premium portable pump universe. With its CNC-machined 6061 aluminum body and laser engraving, this compact 171 mm pump combines extreme lightness (116 g) with exceptional durability. Designed for demanding cyclists, both road and MTB, it transforms emergency inflation into a quick and precise operation thanks to its patented Air Switch system and universal intelligent head.

Technical Highlights

• Patented Air Switch technology: Two-mode switch for optimal inflation — high volume mode under 40 psi to quickly fill the tire, then switch to high pressure mode to easily reach 100+ psi (7+ bar) with less effort.
• Self-adjusting Smart Head: Automatic recognition of Presta and Schrader valves without manipulation or adapter — secure locking with steel latch to prevent any risk of unscrewing the valve core.
• Premium alloy/composite construction: Cylindrical body in CNC 6061 aluminum alloy with high-gloss polished finish and laser engraving, ergonomic composite handle for comfortable grip even in difficult conditions.
• Ultra-compact and lightweight: Only 171 mm long for 116 g — the pump fits perfectly in a saddle bag, jersey pocket or backpack without bulk.
• Dual piston system: Optimized inflation efficiency thanks to the two-piston design, allowing constant and consistent airflow with each pump stroke.
• Bottle cage mount included: Frame mounting bracket with integrated dust cap to protect the valve head during transport — installation under or in place of a standard bottle cage.

Midnight Edition Design and Finish

The Midnight Edition version stands out with its elegant anodized black finish that gives the pump a sleek and refined aesthetic. The contrast between the deep black body, silver laser engravings and composite details creates an object as beautiful as it is functional. Precision CNC machining ensures not only optimal mechanical strength, but also perfect gliding of the internal aluminum piston. Every detail — from the threading of the Air Switch to the Smart Head mechanics — demonstrates Crankbrothers' expertise and quality obsession.

Versatility and Compatibility

Designed to adapt to all cycling disciplines, the Sterling S is suitable for both high-pressure road tires (up to 100 psi and more) and the larger volumes of MTB, gravel, bikepacking or fat bike. Universal Presta/Schrader compatibility eliminates any need for an adapter, while replaceable internal valves ensure maximum longevity. Whether you ride on smooth asphalt or rough trails, this pump accompanies you with complete confidence.

Field Use

In an emergency situation, every second counts. High volume mode allows you to quickly inflate a flat tire to base pressure (approximately 40 psi) with minimal pump strokes. A simple twist of the Air Switch then switches to high pressure mode: resistance decreases significantly, allowing you to reach optimal pressure without exhausting your arms. The Smart Head locks firmly onto the valve, eliminating any risk of leakage or accidental unscrewing of the valve core — a recurring problem with screw-on systems. Robust and reliable, the Sterling S withstands vibrations, mud, sand and weather without flinching.

Crankbrothers Quality Commitment

Founded in 1997 in Laguna Beach (California), Crankbrothers has established itself as a global reference for cycling innovation. Every product — pedals, wheels, dropper posts, pumps and tools — is developed according to a philosophy of disruptive design: start from a blank page and create components that genuinely improve the riding experience. Tested and approved by world-class athletes, the Sterling S benefits from a 5-year warranty, proof of the manufacturer's confidence in the durability of its products.