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bicycle chainring Manufacturers

  • bicycle chainring
  • bicycle chainring
  • bicycle chainring

bicycle chainring

The bicycle chainring is a disc-shaped part installed on the crank, connected to the pedals, and transmits the rider's power to the rear wheel through the chain, thereby propelling the bicycle forward. This metal product has good wear resistance and can withstand continuous chain friction and force transmission. The number of teeth on the sprocket refers to the number of teeth on the sprocket. The larger the number of teeth, the larger the sprocket, which provides more turning power; the fewer the number of teeth, the smaller the sprocket, which provides higher rotational speed. Therefore, the number of teeth directly affects the gear ratio of the bicycle. The size of the bicycle chainring directly affects its rotational force. Larger sprockets usually provide greater rotational force and are suitable for high-speed riding or flat road riding, while smaller sprockets are more suitable for climbing hills or needing to Higher RPM riding.
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  • 4000 m²
    Factory Covered
  • 2004
    Found In
  • 50+
    Factory Employees
  • 60+
    Japanese Advanced Equipment
Ningbo Frienden Precision Components Co., Ltd.

Ningbo Frienden Precision Components Co., Ltd.

Frienden is a factory producing auto parts. Focus on the development and production of auto parts such as precision valves and shafts. Custom bicycle chainring Manufacturers and Wholesale bicycle chainring Suppliers and Factory. It has a production plant of 4,000 square meters and 50 employees. IATF16949 certification, using ERP system. More than 60 sets of the advanced equipment imported from Japan, including Japan's STAR and Tsugami 5-9 axis walking machines, Citizen lathes, Brother Drilling, Taiwanese machining centers, Taiwanese grinding machines and other advanced equipment. It can provide 200,000 high-pressure fuel pumps per year. With complete product quality inspection and control capabilities, including professional testing equipment such as Zeiss, Mitutoyo, etc., to ensure that we provide customers with high-quality products.

As Custom bicycle chainring Factory, We have a young, professional and dedicated R&D, production and sales management team, adhering to the service concept of "integrity, sincerity, and honesty", adhering to the environmental protection spirit of green production and green regeneration. Many high-quality customers have established close cooperation Partnerships.

Plant And Equipment

  • SWISS machining
  • CNC machining center
  • CNC machining center
  • Automaic turning
  • Automaic turning
  • CNC machining center

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Industry Knowledge Extension

How does the Bolt Circle Diameter (BCD) influence the compatibility and interchangeability of chainrings?

The Bolt Circle Diameter (BCD) is a critical parameter that influences the compatibility and interchangeability of chainrings within a bike's drivetrain. Here's how BCD impacts these aspects:
Definition of BCD:
BCD refers to the diameter of the circle that passes through the center of the bolt holes on a bicycle chainring. It is usually measured in millimeters. Common BCD values for chainrings include 110mm, 130mm, 144mm, and 104mm, among others.
Chainring Mounting:
The BCD determines how the chainring is mounted to the crankset. The chainring typically has a specific number of bolt holes arranged in a circular pattern, and the BCD is the diameter of the circle that connects these bolt holes.
Compatibility with Crankset:
The BCD of a chainring must match the BCD of the crankset to ensure compatibility. If the BCDs do not match, the chainring will not fit onto the crankset properly. Different cranksets come with specific BCD measurements, and it's crucial to select chainrings that match this specification.
Interchangeability Between Brands and Models:
Different bicycle manufacturers and crankset models may use specific BCDs based on their design preferences. While there are some standard BCD sizes, it's essential to check the manufacturer's specifications to ensure compatibility. Interchangeability between chainrings from different brands or models often depends on matching BCD values.
Number of Bolt Holes:
The BCD also dictates the number of bolt holes on the chainring. Common configurations include four-bolt and five-bolt patterns. The number of bolts should match the corresponding crankset. For example, a four-bolt chainring won't fit on a crankset designed for a five-bolt pattern.
Drivetrain Speed Compatibility:
The BCD can also be associated with the number of speeds in the drivetrain. For example, smaller BCDs are often associated with compact chainring setups used in modern multi-speed drivetrains, while larger BCDs might be found in older or single-speed setups.
Chainring Size Selection:
BCD influences the range of chainring sizes that can be accommodated on a particular crankset. Larger BCDs often allow for larger chainring sizes, which may be suitable for road bikes and high-speed applications, while smaller BCDs are common in compact setups.
Changing Gear Ratios:
Cyclists can change their gear ratios by swapping chainrings. However, any new chainring must have a matching BCD to the existing crankset. For example, upgrading to a larger or smaller chainring for different riding conditions or preferences requires selecting a chainring with the appropriate BCD.
Adaptability with Spider Adapters:
In some cases, cyclists may use spider adapters to change the BCD of their crankset. These adapters allow for the installation of chainrings with different BCDs than the original crankset. However, this approach has limitations and may not be suitable for all setups.
The Bolt Circle Diameter (BCD) is a crucial parameter that determines the compatibility and interchangeability of chainrings within a bike's drivetrain. Cyclists should pay careful attention to BCD specifications when selecting chainrings, ensuring they match the BCD of the crankset for proper fit and optimal performance.