Chaoyang Inner Tube 20 x 4.0/4.9 for Engwe EP-2 3.0 Boost Electric Bicycle

Chaoyang Inner Tube 20 x 4.0/4.9 for Engwe EP-2 3.0 Boost Electric Bicycle

This Chaoyang inner tube is specifically designed for electric bicycles, offering a suitable replacement for the Engwe EP-2 3.0 Boost model. It is engineered to fit tyres with a nominal diameter of 20 inches and a width range of 4.0 to 4.9 inches.

Key Features and Compatibility

• Exact Fit: Designed for the Engwe EP-2 3.0 Boost electric bicycle.
• Tyre Size: Compatible with 20-inch tyres that have a width between 4.0 and 4.9 inches. Always check the sidewall marking of your existing tyre for precise dimensions.
• Valve Type: Features a Schrader valve (also known as an American valve or car valve), which is 32mm in length.
• Material: Constructed from rubber material.
• Dimensions: The inner tube has an approximate outer diameter of 550mm and an inner diameter of 400mm when inflated, with a cross-sectional width of 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, it is crucial to verify the dimensions marked on the sidewall of your existing tyre. While this inner tube is specified for 20 x 4.0/4.9 tyres, variations can exist. Confirm that your tyre's diameter is 20 inches and its width falls within the 4.0 to 4.9-inch range. Also, check that your rim is compatible with a Schrader valve and that the valve hole accommodates a 32mm valve length.

Installation and Safety Guidance

Proper installation is essential for the longevity and safe operation of your inner tube. Before installation, inspect the inside of the tyre for any sharp objects or debris that could cause punctures. When mounting the tyre and inner tube onto the rim, ensure the inner tube is not pinched between the tyre bead and the rim. Inflate the inner tube gradually, checking that the tyre beads are evenly seated on both sides of the rim. After installation, perform a final check for proper seating and inflation before riding.