The BBB Valve Extender (BTI-99) is a precision-engineered aluminium accessory designed to make your standard inner tubes compatible with high-profile carbon rims. Many performance wheels feature depths of 40mm, 50mm, or more, which often leaves a standard 48mm valve stem hidden inside the rim. These extenders provide the necessary reach to allow for easy inflation and pressure adjustments without needing to hunt for specialized long-valve tubes, which can be harder to find and more expensive.
Unlike "pass-through" extenders that simply screw over the top of a closed valve, the BBB BTI-99 system uses a removable core design. This means you move your tube's actual valve core to the end of the extender. This results in a much more reliable seal and allows you to open and close the valve as if it were a standard length stem, eliminating the common issue of air leaking out during inflation or "rattling" valve nuts inside the rim.
Removable Core Design: Ensures the valve remains fully functional at the end of the extension, providing reliable airflow and a secure seal.
Lightweight Aluminium Construction: Crafted from high-grade alloy to minimise rotational mass, weighing in at approximately 10g per pair.
Integrated Installation Tool: Includes a specialized tool to safely remove the valve core and torque the extender down snugly, preventing air leaks.
O-Ring Seal Integration: Features internal seals to ensure an airtight connection between the tube stem and the extender body.
Deep Rim Compatibility: The 50mm length is ideal for rims with a depth of 45mm to 60mm, ensuring enough thread is exposed for your pump head to lock on.
Sleek Anodised Finish: The durable black finish provides a professional, integrated look that blends seamlessly with carbon wheelsets.
| Feature | Specification |
| Material | Aluminium Alloy |
| Length | 50mm |
| Compatibility | Presta Valves with Removable Cores |
| Quantity | 2 Pieces + 1 Installation Tool |
| Weight | ~10g (Pair) |
| Product Code | BTI-99.50 |
Carbon Wheel Owners: If you have upgraded to deep-section aero wheels and want to continue using your standard, affordable inner tubes.
Race-Day Preparedness: Perfect for keeping in your saddle bag or tool keg as a backup; if you get a flat and your spare tube has a short valve, this saves your ride.
Performance Road Riders: Ideal for those who want a permanent, leak-free extension that won't lose pressure over the course of a long training ride or race.
Fixed-Core Tube Users: These extenders only work with tubes that have a removable valve core. If your valve core does not unscrew, you will need a "sleeved" style extender.
Shallow Box-Section Rims: If you are using standard alloy training wheels, a 50mm extender will be unnecessarily long and may vibrate against the rim.
To ensure a 100% airtight seal, we recommend adding a tiny wrap of plumber’s Teflon (PTFE) tape to the threads of the extender before screwing it into the tube stem. This provides an extra layer of security against slow leaks. When installing, use the provided tool to get the extender "fingertip tight" plus a quarter turn—do not over-torque it, as this can damage the rubber O-ring inside and actually cause the leak you are trying to prevent!
