Chaoyang Inner Tube 20 x 4.0/4.9 for Engwe M20 Electric Bicycle

Chaoyang Inner Tube 20 x 4.0/4.9 for Engwe M20 Electric Bicycle

This Chaoyang inner tube is specifically designed for electric bicycles, offering a direct replacement for the Engwe M20 model. It is compatible with tyres marked 20 x 4.0 or 20 x 4.9.

Key Features and Compatibility

• Product Name: Chaoyang Inner Tube 20 x 4.0/4.9 for Engwe M20 Electric Bicycle
• Tyre Compatibility: Suitable for tyres with a nominal diameter of 20 inches and widths ranging from 4.0 to 4.9 inches.
• Vehicle Compatibility: Engineered to fit the Engwe M20 electric bicycle.
• Material: Constructed from rubber material.
• Valve Type: Features a Schrader valve (also known as an American valve), which is 32mm in length.
• Dimensions: The inner tube has an approximate outer diameter of 550mm and an inner diameter of 400mm when uninflated. Its width is approximately 60mm.
• Net Weight: Approximately 0.38 kg.

Choosing the Correct Inner Tube

To ensure correct fitment, always verify the size markings on your existing tyre's sidewall. The inner tube's dimensions (20 x 4.0/4.9) must match or fall within the specified range of your tyre. Additionally, confirm that your wheel rim is designed for a Schrader valve and that the valve hole accommodates the 32mm length.

Installation and Safety Guidance

When installing the inner tube, follow these general steps to help prevent damage and ensure safe operation:

• Carefully remove the old inner tube and inspect the tyre for any sharp objects, punctures, or damage.
• Partially inflate the new inner tube to give it shape before inserting it into the tyre. This helps prevent pinching.
• Ensure the valve is correctly seated through the rim's valve hole and secured with its nut.
• Mount the tyre onto the rim, taking care not to pinch the inner tube between the tyre bead and the rim.
• Inflate the tyre gradually, checking that the tyre bead is evenly seated around the rim on both sides.
• Inflate to the pressure recommended on your tyre's sidewall, not exceeding the maximum stated pressure.
• After installation, check for any leaks and ensure the valve cap is securely fastened.

Regularly inspect your tyres and inner tubes for wear, damage, or proper inflation to maintain riding safety and performance.