• Chaoyang Inner Tube 20 x 4.0/4.9 – inflated tube, front view
  • Chaoyang Inner Tube 20 x 4.0/4.9 – inflated tube with dimensions and weight
  • Chaoyang Inner Tube 20 x 4.0/4.9 – inflated tube, angled view
  • Chaoyang Inner Tube 20 x 4.0/4.9 – inflated tube, top view
  • Chaoyang Inner Tube 20 x 4.0/4.9 – inflated tube, slightly angled view
  • Chaoyang Inner Tube 20 x 4.0/4.9 – front three-quarter view

Chaoyang Inner Tube 20 x 4.0/4.9 for Engwe Engine Pro 3.0 Boost Electric Bicycle

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Viewing / collection in person is possible Monday to Saturday.
Opening hours: Mon–Fri: 9:00–19:00
Sat: 10:00–16:00
Sun & public holidays: CLOSED
Address: Tržaška cesta 222, 1000 Ljubljana
Phone: +386 30 771 787
Email: [email protected]
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19,90 EUR
19,90 EUR
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Chaoyang Inner Tube 20 x 4.0/4.9 for Engwe Engine Pro 3.0 Boost Electric Bicycle

This Chaoyang inner tube is specifically designed for the Engwe Engine Pro 3.0 Boost electric bicycle, fitting tires with a nominal diameter of 20 inches and widths ranging from 4.0 to 4.9 inches. It serves as a direct replacement for a damaged or worn inner tube, helping to restore reliable air retention and proper tire function.

Key Features and Compatibility

  • Exact Fit: Designed for the Engwe Engine Pro 3.0 Boost electric bicycle.
  • Size: Compatible with 20-inch diameter tires, suitable for widths between 4.0 and 4.9 inches.
  • Valve Type: Features a Schrader valve (also known as an American valve), which is 32mm long and angled.
  • Dimensions: The inner tube has an approximate outer diameter of 550mm and an inner diameter of 400mm when uninflated. Its width is approximately 60mm.
  • Weight: The net weight of the inner tube is approximately 0.38 kg.

Choosing the Correct Inner Tube

To ensure correct fitment, always verify the dimensions marked on the sidewall of your existing tire. Look for markings such as "20 x 4.0" or "20 x 4.9". While this inner tube is compatible with the Engwe Engine Pro 3.0 Boost, checking your tire's specific markings is crucial, especially if you have aftermarket tires.

Installation and Safety Guidance

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

  • Inspect the Tire: Before installation, carefully check the inside of the tire for any sharp objects, debris, or damage that could puncture the new tube.
  • Slightly Inflate: Inflate the new inner tube slightly before inserting it into the tire. This helps it hold its shape and prevents pinching during installation.
  • Seating: Ensure the inner tube is evenly seated within the tire casing and that the valve stem is properly aligned with the valve hole in the rim.
  • Inflation: Inflate the tire gradually, checking that the tire beads are properly seated on the rim. Do not exceed the maximum pressure recommended on your tire's sidewall.
  • Post-Installation Check: After inflation, visually inspect the tire and rim for any bulges or uneven seating.

If you are unsure about the installation process, it is recommended to seek assistance from a qualified bicycle mechanic.

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