HS Code | Official Doc | Tariff Rate | Origin | Destination | Effective Date |
---|---|---|---|---|---|
8481801050 | Doc | 59.0% | CN | US | 2025-05-12 |
8481909085 | Doc | 80.0% | CN | US | 2025-05-12 |
8487900080 | Doc | 83.9% | CN | US | 2025-05-12 |
8487900040 | Doc | 58.9% | CN | US | 2025-05-12 |
7326902500 | Doc | 80.0% | CN | US | 2025-05-12 |
7326908688 | Doc | 82.9% | CN | US | 2025-05-12 |
8309900010 | Doc | 57.6% | CN | US | 2025-05-12 |
8309900090 | Doc | 57.6% | CN | US | 2025-05-12 |
8307103000 | Doc | 58.8% | CN | US | 2025-05-12 |
8307903000 | Doc | 58.8% | CN | US | 2025-05-12 |
4016996010 | Doc | 57.5% | CN | US | 2025-05-12 |
4016996050 | Doc | 57.5% | CN | US | 2025-05-12 |
4007000000 | Doc | 55.0% | CN | US | 2025-05-12 |
7318220000 | Doc | 80.0% | CN | US | 2025-05-12 |
Bicycle Valve Core
A bicycle valve core is a self-locking mechanism situated inside the valve stem of a bicycle tire, responsible for retaining air pressure. It is a crucial component for inflating and deflating tires, and maintaining airtightness.
Material
Valve cores are commonly constructed from:
- Brass: The most prevalent material due to its durability, corrosion resistance, and ease of machining.
- Aluminum: Lighter than brass, often used in higher-end components where weight reduction is prioritized.
- Stainless Steel: Offers superior corrosion resistance, suitable for harsh conditions or saltwater environments.
Purpose
The primary purposes of a valve core are:
- Air Retention: Creates a sealed environment within the tire to hold air pressure.
- Inflation/Deflation Control: Allows air to be added or removed from the tire using a pump or valve tool.
- Preventing Leakage: Minimizes air loss when not in use.
Function
The valve core operates using a spring-loaded pin.
- When a pump nozzle is engaged, it depresses the pin, opening the valve and allowing air to flow into the tire.
- When the pump is removed, the spring forces the pin back into its seated position, sealing the valve.
- The core's threaded design allows it to be removed and replaced, enabling tire servicing or replacement of a faulty core.
Usage Scenarios
Valve cores are integral to the following scenarios:
- Tire Inflation: Used with various pump types (floor pumps, hand pumps, CO2 inflators) to achieve desired tire pressure.
- Tire Deflation: A valve core tool is used to unscrew the core, allowing rapid air release.
- Tire Pressure Adjustment: Allows for fine-tuning of tire pressure for optimal performance and comfort.
- Tubeless Tire Setup: Used with tubeless-compatible rims and sealant to create an airtight seal without an inner tube.
- Replacing a Damaged Core: When a core leaks or becomes damaged, it can be removed and replaced with a new one.
Common Types
Several types of valve cores are available, categorized by valve stem type:
- Presta (French Valve) Cores: Characterized by a small, lockable nut at the valve stem. Often used on road bikes and higher-end mountain bikes. Requires a specific Presta valve core tool for removal/installation.
- Schrader (American Valve) Cores: Similar to car tire valves. Commonly found on mountain bikes, hybrid bikes, and children's bikes. Compatible with standard car tire pumps.
- Dunlop (Wood Valve) Cores: Less common in modern bicycles, primarily found on older models or some specific types of bikes.
- Tubeless Valve Cores: Designed with a larger diameter to accommodate sealant flow and a rubber gasket for a tight seal against the rim. Often feature a removable core for easier sealant addition.
Bicycle valve cores are components used in bicycle tires to control air retention. They are typically small, threaded cylinders inserted into the valve stem.
Here are relevant HS codes based on the provided reference material:
-
7318220000: Detachable bicycle parts and bicycle fittings; saddle stems; handlebar stems; grips and steering wheels; pedals; lamps; reflectors; mudguards; stands; pumps, valves and valve caps.
- 73: Machinery parts, not containing electrical connectors, insulators, coils, contacts or other electrical features, and not specified or included elsewhere in this chapter. This chapter covers a broad range of bicycle components.
- 18: Parts and accessories of bicycles, motorcycles or cycles. This heading specifically focuses on bicycle parts.
- 22: Detachable bicycle parts and bicycle fittings. This subheading narrows down to parts that can be removed and replaced, including valves and valve caps.
-
4016996010: Other articles of vulcanized rubber other than hard rubber: Other: Other: Other: Other Mechanical articles for motor vehicles.
- 40: Rubber and articles thereof. This chapter covers products made from rubber.
- 16: Articles of vulcanized rubber other than hard rubber. This heading specifies rubber articles that are not hard rubber.
- 99: Other articles. This subheading covers a variety of rubber articles not specifically classified elsewhere.
- 60: Mechanical articles for motor vehicles. This further specifies the rubber articles as being used for vehicles.
-
4016996050: Other articles of vulcanized rubber other than hard rubber: Other: Other: Other: Other: Other Other.
- 40: Rubber and articles thereof. This chapter covers products made from rubber.
- 16: Articles of vulcanized rubber other than hard rubber. This heading specifies rubber articles that are not hard rubber.
- 99: Other articles. This subheading covers a variety of rubber articles not specifically classified elsewhere.
- 60: Other. This further specifies the rubber articles as being other.
Regarding HS code 7318220000, please note that the reference material indicates a potential additional tariff of 25% for steel, aluminum products.
Regarding HS codes 4016996010 and 4016996050, the reference material indicates a tariff of 25% and a potential additional tariff of 30%.