The DUKE Racing Wheels Presta valve core is an essential replacement part to guarantee airtightness and pressure retention in your tires. Made of precision-machined brass, this core installs on all Presta valves with removable mechanism, whether for tubeless, standard inner tube or tubular setups. An indispensable part in the workshop of every demanding cyclist, road or MTB.

Why replace the valve core?

The core is the heart of the valve system: it ensures the airtightness of the pressurized air. Over time, the seals can wear out, degrade in contact with tubeless sealants or deteriorate during repeated handling. A faulty core causes slow pressure losses, annoying during long rides or in competition. Regular replacement of this part guarantees optimal reliability and avoids unpleasant surprises on the road or trail.

Construction and materials

• High-quality brass: The choice of brass offers a perfect balance between mechanical strength, longevity and corrosion resistance. A traditional material for precision valve making, it guarantees lasting airtightness.
• Precision machining: Each DUKE core is carefully machined to ensure regular threading and play-free assembly. Dimensional precision prevents leaks and facilitates assembly/disassembly.
• Quality internal seal: The seal ensures pressure retention while resisting prolonged contact with sealants used in tubeless setups.

Compatibility and use

This replacement core fits all Presta valves with removable core, regardless of manufacturer (DUKE, Continental, Schwalbe, Stan's NoTubes, etc.). It suits all types of configurations: road wheels, MTB XC/Enduro/DH, gravel, cyclocross. Compatible with valves of different heights (34 mm, 44 mm, 51 mm, 57 mm and more) and valve extenders for aero or deep-section rims.

Advantages in tubeless setup

• Accelerated inflation: Removing the core significantly increases airflow during initial inflation, facilitating tubeless tire bead seating.
• Sealant injection: The removable core simplifies adding sealant directly through the valve, without dismounting the tire.
• Cleaning and maintenance: Ability to clean the inside of the valve and replace the core if clogged by dried sealant.

DUKE Racing Wheels brand

DUKE Racing Wheels is a French artisanal brand founded in 2011 by Philippe Jacquinet, based in Chambretaud (Vendée). Specialized in high-end carbon and aluminum wheels, DUKE develops a complete range of quality accessories to complement its wheels: tubeless valves, extenders, rim strips, nuts and accessories. The DUKE philosophy: lightness, reliability and performance for demanding cyclists, from sportive riders to competitors.