Chaoyang Inner Tube 20 x 4.0/4.9 for Engwe Engine X Electric Bicycle

Chaoyang Inner Tube 20 x 4.0/4.9 for Engwe Engine X Electric Bicycle

This Chaoyang brand inner tube is specifically designed for electric bicycles, providing a suitable replacement for the Engwe Engine X model. It is compatible with 20-inch tyres with a width range of 4.0 to 4.9 inches.

Key Features and Compatibility

• Exact Fit: Designed for the Engwe Engine X electric bicycle.
• Tyre Size: Compatible with 20-inch tyres.
• Tyre Width Range: Suitable for tyres with widths between 4.0 and 4.9 inches.
• Valve Type: Features a Schrader valve (also known as an American valve), which is 32mm long.
• Material: Made from rubber for reliable performance.
• Dimensions: The inner tube has an outer diameter of approximately 550mm and an inner diameter of 400mm when inflated. The cross-section width is approximately 60mm.
• Weight: The net weight of the inner tube is approximately 0.38 kg.

Choosing the Correct Inner Tube

To ensure you select the correct inner tube, always verify the markings on your existing tyre's sidewall. The nominal wheel size alone is not sufficient. Look for the full size designation, such as "20 x 4.0" or "20 x 4.9", to confirm compatibility with this inner tube's specified range.

Installation and Safety Guidance

Proper installation is crucial for the longevity and safety of your inner tube and tyre. Before installation:

• Carefully inspect the inside of the tyre for any sharp objects, debris, or damage that could puncture the new tube.
• Ensure the rim strip is in good condition and properly seated to protect the inner tube from spoke ends.
• Partially inflate the inner tube before inserting it into the tyre to give it shape and help prevent pinching during installation.
• When seating the tyre bead, ensure the inner tube is not pinched between the tyre and the rim.
• Inflate the tyre gradually, checking that the tyre bead is evenly seated around the rim on both sides.
• Always inflate to the pressure recommended on your tyre's sidewall, not exceeding the maximum stated pressure.
• After installation, check the tyre pressure regularly and before each ride to maintain optimal performance and safety.