CST Inner Tube 14 x 2.125 with Curved Valve 90°/60° for Electric Bicycle

CST Inner Tube 14 x 2.125 with Curved Valve 90°/60° for Electric Bicycle

This CST inner tube is designed for electric bicycles and other vehicles requiring a 14-inch diameter inner tube with a width of 2.125 inches. It features a curved valve, angled at 90°/60°, which can be particularly useful for wheels with limited access to the valve stem.

Key Features and Advantages

• Size: 14 x 2.125 inches, suitable for tyres with corresponding sidewall markings.
• Valve Type: Curved valve (90°/60° angle) for easier inflation, especially in tight spaces or with specific rim designs.
• Brand: CST, a known manufacturer of bicycle tyres and tubes.
• Application: Ideal for replacing worn or punctured inner tubes on electric bicycles and similar vehicles.

Compatibility and Selection

To ensure correct fitment, it is crucial to verify the exact dimensions of your existing tyre and rim. The nominal wheel size (e.g., 14 inches) alone is not sufficient. Always check the full size marking on the sidewall of your current tyre, which should match the "14 x 2.125" specification of this inner tube. Additionally, confirm that the curved 90°/60° valve angle is compatible with your rim's valve hole and overall wheel design.

The inner tube has an outer diameter of approximately 333mm and an inner diameter of 265mm when uninflated. The valve stem length is approximately 25mm from the tube surface to the tip of the valve. The net weight of the inner tube is approximately 139.4g.

Installation and Safety Guidance

Proper installation is essential for the longevity and safety of your inner tube. When installing:

• Ensure the tyre bead is fully seated within the rim.
• Partially inflate the inner tube before fully seating it inside the tyre to prevent pinching.
• Carefully check for any foreign objects inside the tyre or on the rim that could cause a puncture.
• Inflate the tyre to the pressure recommended by the tyre manufacturer, not exceeding the maximum pressure indicated on the tyre sidewall.
• After installation, check that the valve is straight and securely positioned, and that the tyre is evenly seated on the rim.

Regularly inspect your tyres and inner tubes for signs of wear or damage. Maintaining correct tyre pressure is vital for optimal performance and to prevent punctures.