KENDA 700C Series Inner Tube

Contents

KENDA Bicycle Inner Tube User Manual

Brand: KENDA | Model: 700C Series Inner Tube

1. Product Overview

This manual provides essential information for all KENDA bicycle inner tubes, which are made from high-quality butyl rubber and are available in various sizes. It covers installation, operation, safety precautions, and compliance details to ensure safe and effective use of your inner tube.

KENDA 700C inner tube, packaging, and tire lever
Figure 1: KENDA 700C inner tube, packaging, and included tire lever.

For a downloadable version of this manual, please refer to the User Manual (PDF).

2. Safety Information

WARNING: Failure to follow these safety instructions may result in serious injury or product damage.

  • Inflation Pressure: Over-inflation can cause sudden tire blowout, leading to loss of control and serious injury. Always inflate to the rated pressure marked on the tire sidewall.
  • Installation: Improper installation (e.g., twisted or pinched tube) can cause tire failure during riding. Ensure correct installation or seek professional assistance.
  • Pre-Ride Check: Always inspect the inner tube and tire for damage before each ride. Do not ride with damaged components to prevent accidents.
  • Child Safety: Keep inner tubes away from children to prevent choking hazards or injury from improper handling.
  • Heat and Fire: Do not expose the inner tube to open flames or high temperatures, as this may cause melting, bursting, or fire hazards.
  • Chemical Exposure: Keep the tube away from sharp objects, oil, chemicals, and high-temperature sources to prevent aging and damage.

3. Product Compatibility and Selection

Choosing the correct inner tube is crucial for performance and safety. Follow these steps to ensure compatibility:

  1. Identify Inner Tube Model Markings: Understand the markings on the inner tube and tire.
    Diagram explaining inner tube model markings
    Figure 2: Breakdown of inner tube model markings (Wheel diameter size, Match tire width, Valve stem type, Valve stem length).
  2. Check Tire Compatibility Specifications: Locate the specifications marked on the sidewall of your bicycle tire.
    Image showing how to check tire compatibility specifications on a tire sidewall
    Figure 3: Example of tire sidewall markings (e.g., 26x1.95) to determine compatible inner tube size.
  3. Identify Valve Type and Length: Determine if your rim requires an American Valve (AV) or French Valve (FV) and measure your rim height to select the appropriate valve stem length.
    Diagram showing American-style valve core dimensions
    Figure 4: American Valve (AV) dimensions (Diameter 7.8mm, lengths 32mm, 48mm, 60mm).
    Diagram showing French valve dimensions
    Figure 5: French Valve (FV) dimensions (Diameter 5.8mm, lengths 36mm, 48mm, 60mm, 80mm).

    Use the following table to select the correct valve length based on your rim height:

    Table of compatible valve specifications based on rim height
    Figure 6: Compatible valve specifications table. For rim height ≤25mm, use Standard 32mm (AV) or 36mm (FV). For 25~35mm, use Extended 48mm. For 35~50mm, use Extended 60mm. For 50~70mm, use Extended 80mm.

4. Installation Steps

  1. Check Compatibility: Confirm that the inner tube size (e.g., 700x23C-28C) matches the size marked on your tire.
  2. Prepare Rim: Clean the rim surface thoroughly. Install rim tape to cover spoke holes, ensuring there are no sharp edges that could damage the inner tube.
  3. Place Inner Tube: Slightly inflate the inner tube to give it shape. Carefully place it into the tire evenly, making sure it is not twisted or pinched.
  4. Mount Tire: Install the tire onto the rim. Gradually inflate the tire to the rated pressure (found on the tire sidewall), continuously checking for any signs of the inner tube being pinched between the tire bead and the rim.

5. Usage Instructions

  • Inflation: Inflate the inner tube strictly according to the rated pressure marked on the tire. Avoid both over-inflation and under-inflation.
  • Regular Checks: Regularly inspect the inner tube and tire for air leaks, punctures, and valve damage. Replace any damaged tubes immediately.
  • Limitations: This product is designed for ordinary bicycle use only. It is not suitable for electric bicycles, motorcycles, or extreme riding conditions.

6. Maintenance & Storage

  • Cleaning: After use, clean the inner tube with clean water and dry it in a cool, well-ventilated area, away from direct sunlight.
  • Storage: Store the inner tube in a dry, cool, dark environment. Keep it away from oil, chemicals, and sharp objects to prevent degradation.
  • Replacement: Replace the inner tube regularly, depending on usage frequency and signs of aging, to ensure optimal performance and safety.

7. Troubleshooting

If you encounter issues with your KENDA inner tube, consider the following:

  • Frequent Punctures: Check your tire for embedded debris (glass, thorns) or sharp edges on the rim. Ensure rim tape is properly installed and covers all spoke holes.
  • Air Loss: Verify that the valve stem is tightened correctly and not leaking. Check for small punctures by inflating the tube and submerging it in water to locate bubbles.
  • Tire Blowout: This is often caused by incorrect tire pressure (over-inflation) or improper installation where the tube is pinched. Always inflate to the recommended pressure and ensure the tube is seated correctly.
  • Tube Damage: Do not attempt to repair severely damaged, cracked, or aged inner tubes. Replace them immediately for safety.

8. Specifications

Feature Detail
Product Name Air-tight butyl rubber bicycle inner tube
Brand KENDA
Suitable for 700C Series Inner Tube (Road Bikes, Fixed Gear Bikes, Touring Road Bikes)
Material Butyl rubber (IIR)
Origin Mainland China (Shenzhen/Kunshan)
Valve Type AV (American Valve) / FV (French Valve)
Valve Lengths (AV) 32mm, 48mm
Valve Lengths (FV) 36mm, 48mm, 60mm, 80mm
Compatible Tire Widths 18C, 23C, 25C, 28C, 32C, 35C, 43C, 45C
Package Dimensions (approx.) Length: 13cm, Width: 7cm, Height: 6cm
Package Weight (approx.) 0.22 kg
Close-up of KENDA inner tubes highlighting quality and advanced formula
Figure 7: KENDA inner tubes are manufactured using an advanced butyl rubber formula from Taiwan, ensuring excellent air tightness, heat resistance, and durability.
Close-up of KENDA inner tubes emphasizing racing-grade airtightness
Figure 8: Jianda inner tubes feature racing-grade airtightness due to good chemical and thermal stability, with air permeability significantly lower than natural rubber or general styrene-butadiene rubber inner tubes.

9. Compliance Information

This product bears the CE mark, indicating compliance with EU safety regulations and relevant standards for bicycle accessories.

Applicable Regulations & Harmonized Standards:

  • EU Regulation: (EU) 2023/931 (General Product Safety Regulation)
  • Harmonized Standard: EN 14764:2005+A1:2008 (Cycles - Safety requirements for bicycles)
  • International Standard: ISO 4210:2016 (Cycles - Safety requirements for bicycles)
  • Material Standard: EN 14350-1:2004 (Rubber materials for bicycle accessories)

10. User Tips

  • Tire Lever: Some packages may include a tire lever, which is a helpful tool for easier tire removal and installation. Utilize it to prevent pinching the tube during mounting.
  • Value for Money: Users often praise the product for its excellent quality relative to its price.

11. Warranty and Support

For any questions, concerns, or support regarding your KENDA inner tube, please contact the seller or retailer from whom you purchased the product. They will be able to provide assistance in accordance with their specific warranty and customer service policies.

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