Specifications

Tube Size

1. Dimensions:

   • 27 x 1-1/8–1-1/4
     • Designed for bicycles equipped with 27-inch wheels, a common standard for vintage road and touring bikes.
     • Width Range:
       • 1-1/8 inch: For narrower tires suited for high-speed and lightweight road cycling.
       • 1-1/4 inch: Slightly wider for enhanced stability and comfort during longer rides or light touring.

2. Applications:

   • Ideal for classic road bikes, vintage bicycles, and touring models where a balance of speed and comfort is desired.

Valve Details

1. Valve Type:

   • Presta Valve
     • Preferred in road cycling due to its slim design, which fits narrower rims.

2. Valve Length:

   • 52mm
     • Designed for medium-profile rims, ensuring adequate clearance for easy inflation.

3. Valve Core:

   • Non-Removable
     • Reduces the risk of accidental core damage and ensures a consistently reliable air seal.

4. Valve Stem:

   • Threaded
     • Enhances pump head grip, minimizing slippage during inflation.

5. Valve Angle:

   • 0 Degrees (Straight)
     • A standard alignment compatible with all Presta valve pumps.

Material and Construction

1. Material:

   • Premium Rubber
     • Known for its excellent elasticity, air retention, and resistance to punctures.

2. Wall Thickness:

   • Standard Thickness
     • Optimized to provide a balance between weight savings and durability.

3. Construction:

   • Seamless Tube
     • Reduces the likelihood of weak spots, enhancing reliability and longevity.

Performance Features

1. Tire Compatibility:

   • Fits tires sized 27 x 1-1/8 to 1-1/4 inches, suitable for high-pressure applications:
     • 1-1/8 inch Tires: For faster rides with minimal rolling resistance.
     • 1-1/4 inch Tires: Offers more comfort and better grip, especially on uneven terrain.

2. Pressure Range:

   • Supports pressures typically between 80–115 PSI, depending on the tire size and intended use.

3. Air Retention:

   • The rubber ensures minimal air loss, requiring less frequent inflation.

4. Puncture Resistance:

   • Standard wall thickness protects against minor punctures and abrasions.

5. Versatility:

   • Suitable for both recreational and competitive road cycling, as well as light touring.

Design Features

1. Valve Construction:

   • Non-Removable Core:
     • Provides a secure and tamper-resistant design.
   • Threaded Stem:
     • Ensures compatibility with Presta-specific pumps and locking mechanisms.

2. Valve Length:

   • The 52mm stem accommodates rims with medium profiles, offering a clean aesthetic and practical inflation access.

3. Tube Construction:

   • Seamless Design: Enhances uniformity and reduces risks of failure.

Brand Information

1. Brand:

   • Duro
     • A trusted name in the cycling industry, recvintagenized for producing reliable, high-quality inner tubes and tires.

2. Reputation:

   • Known for affordability without compromising performance, Duro tubes are widely appreciated by cyclists globally.