The Topeak 40mm Presta Valve Extender Pair is a precision-engineered accessory designed to extend the height of short valve stems, making it ideal for mid-to-deep section aerodynamic rims. Crafted from high-strength aircraft-grade aluminum alloy, this lightweight set ensures easy connection to standard floor pumps for both tubes and tubeless setups, minimizing unnecessary air loss.

Key Specifications:

• Extension Length: 40mm.
• Material: Premium aircraft-grade aluminum alloy for durability and performance.
• Weight: Ultra-lightweight at just 1.8 grams per extender to prevent wheel imbalance.
• Valve Compatibility: Designed exclusively for two-piece Presta valves with removable valve cores.
• Package Contents: Includes 2 valve extenders and 1 aluminum core removal tool.

Performance & Installation Design:

• Removable Core Integration:
  The extender sits inline with the valve stem. Use the included tool to:
  1. Unthread the current valve core.
  2. Thread the 40mm extension onto the stem.
  3. Reinstall the original valve core onto the extender.
     This design leaves the operational valve core fully accessible at the rim's edge for easy adjustments.
• Included Alloy Valve Tool:
  A dedicated wrench tool is provided to securely lock the extender pieces and core threads, ensuring an air-tight system under high pressure.
• Pro Installation Tip:
  For a flawless, leak-free seal, wrap the male threads of both the valve core and extender with a small strip of Teflon thread tape before screwing them tight.

This thoughtfully designed extender ensures optimal performance and ease of use, making it a must-have accessory for cyclists using aerodynamic rims.