
Specialized Airlock Self-Sealing Presta Bike Tube Multiple Sizes
Size
Specialized Airlock Self-Sealing Presta Bike Tube Multiple Sizes
700 X 20-28C 48MM
Stage 21 Bikes
23582 Moulton Parkway
#111
Laguna Woods CA 92637
United States
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Specialized Airlock Presta Valve Self-Sealing Bicycle Tube
Self-Sealing | Presta Valve | Airlock Sealant | Multiple Sizes
The Specialized Airlock Presta Valve Tube is engineered to help keep you riding longer with fewer flats. Filled with Specialized's exclusive Airlock self-sealing sealant, these premium inner tubes automatically seal small punctures while continuously helping prevent slow air leaks.
Unlike many self-sealing tubes, Airlock features a homogenous, non-separating formula that stays evenly distributed inside the tube, eliminating sealant pooling while providing smooth, balanced performance throughout every ride.
Ideal for road, gravel, mountain, and hybrid bikes, Airlock tubes deliver dependable puncture protection without sacrificing ride quality.
Integrated Airlock Self-Sealing Technology
The built-in Airlock sealant actively seals small punctures before they become ride-ending flats.
Benefits include:
- Automatically seals small punctures
- Helps reduce flats from thorns and road debris
- Continuous protection while riding
- Greater confidence on every ride
Perfect for riders who want dependable flat protection without switching to tubeless.
Continuous Leak Protection
Airlock doesn't stop working after installation.
The advanced sealant continuously helps prevent slow air leaks, allowing your tires to maintain pressure longer.
Advantages include:
- Reduced pressure loss
- Less frequent inflation
- Improved reliability
- More uninterrupted riding
Non-Toxic, Homogenous Formula
Unlike many traditional tube sealants, Specialized's Airlock formula remains evenly distributed throughout the tube.
Features include:
- Non-toxic formulation
- Non-separating design
- No sealant pooling
- No shaking required
- Will not dry out like many conventional sealants
The result is smooth rolling performance and consistent puncture protection throughout the life of the tube.
Reliable Presta Valve
Each tube features a dependable Presta valve for lightweight performance and secure inflation.
Available with:
- Standard Presta valve
- 48mm Presta valve (700 x 20–28c)
Compatible with most modern road, gravel, cyclocross, hybrid, and mountain bike wheels.
Available Sizes & Part Numbers
| Size | MPN |
|---|---|
| 26 x 1.75–2.4 | 0313-0523 |
| 27.5 / 650B x 1.75–2.4 | 03115-0514 |
| 29 x 1.75–2.4 | 0311-0500 |
| 700 x 20–28c | 0303-0503 |
| 700 x 20–28c (48mm Valve) | 0300-0510 |
| 700 x 28–38c | 0303-0506 |
| 700 x 32–50c | 03015-0508 |
Specifications
- Brand: Specialized
- Product: Airlock Self-Sealing Bicycle Tube
- Valve Type: Presta
- Sealant: Integrated Airlock Self-Sealing Formula
- Sealant Formula: Non-Toxic, Non-Separating
- Leak Protection: Continuous
- Applications: Road, Gravel, Cyclocross, Hybrid, Mountain, and Commuter Bikes
- Available Sizes: Multiple wheel and tire sizes
Key Features
✔ Genuine Specialized Airlock self-sealing tube
✔ Integrated Airlock sealant automatically seals small punctures
✔ Helps prevent slow air leaks
✔ Non-toxic, non-separating formula
✔ No sealant pooling or shaking required
✔ Sealant remains effective without drying out
✔ Lightweight Presta valve
✔ Available in multiple bicycle sizes
Ideal For
✔ Road cycling
✔ Gravel riding
✔ Cyclocross
✔ Mountain biking
✔ Hybrid bikes
✔ Commuting
✔ Riders seeking fewer flats without converting to tubeless
Why Choose the Specialized Airlock Tube?
- Integrated Airlock sealant continuously protects against punctures and slow leaks
- Homogenous sealant stays evenly distributed for smooth, balanced performance
- Non-toxic formula won't separate or dry out over time
- Lightweight Presta valve is compatible with modern performance bicycles
- Available in a wide range of mountain, gravel, hybrid, and road bike sizes
- Genuine Specialized quality trusted by cyclists around the world
The Specialized Airlock Presta Valve Tube provides advanced self-sealing puncture protection for riders who want fewer flats and more dependable performance. With its exclusive Airlock sealant, continuous leak protection, and balanced non-separating formula, it's an excellent choice for everything from daily commutes to endurance rides and rugged trail adventures.


