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Founded in 1991, Ningbo Sunrun Bicycle Co., ltd & Its branch company Ningbo Tongkin Technology Co., Ltd.

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OEM/ODM MTB Bike Single Chainwheel & Crank Set
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Ningbo Tongkin Technology Co., Ltd.
About SunRun

Ningbo Dongjin Technology Co., Ltd is China OEM MTB Bike Single Chainwheel & Crank Set Supplier and ODM MTB Bike Single Chainwheel & Crank Set company was founded in 1991, specializing in the production of bicycle transmission systems, braking systems and other components. The leading products include a series of derailleurs, variable speed flywheels, high-end cassette hubs, disc brakes, brake components, cranksets and more than 300 varieties in six categories.

In 2015, in response to Made in China 2025, the company established Ningbo Dongjin Technology Co., Ltd. to develop a new internal and external variable speed transmission system, entering the first echelon of the domestic industry. "Chicheng wheel industry, quality first" is the pursuit of quality by Richeng people. The company has introduced internationally advanced key technologies such as precision cold forging, CNC machining, heat treatment, and multi-station stamping to develop transmissions with Richeng characteristics. , transmission kit, sales volume leads domestic peers. The registered brands SUNRUN, TONGKEEN and HEMU enjoy high reputation in domestic and foreign markets. The company has independent export rights, and its products are exported to Europe, North America, Central and South America, Africa, Southeast Asia and other countries and regions. Xu Mingqiang, chairman of the company, sincerely invites domestic and foreign merchants to come for negotiation and guidance.

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Industry Knowledge Extension

How does the material of the MTB Bike Single Chainwheel & Crank Set affect its strength and durability?

The material of the MTB Bike Single Chainwheel & Crank Set has a significant impact on its strength and durability. Here is an analysis of different materials and their effects:
Aluminum:
Strength: Aluminum alloy is a lightweight and relatively strong metal that is widely used in bicycle component manufacturing. It can withstand certain impacts and loads, but may not be as strong as other materials in extreme conditions.
Durability: Aluminum alloy has good corrosion resistance and can maintain a long service life in a variety of environmental conditions. However, severe impact or excessive wear may cause deformation or damage.
Steel:
Strength: Steel is a traditional bicycle component material with excellent strength. It is able to withstand higher shock loads and is suitable for applications requiring greater durability.
Durability: Steel’s durability is exceptional, especially in harsh environments. It is not easily deformed and can withstand long-term wear and tear. However, steel components are generally heavier than aluminum alloy components.
Carbon Fiber:
Strength: Carbon fiber is a lightweight yet extremely strong material that is widely used in high-end bicycle components. It provides excellent strength and stiffness while maintaining extremely light weight.
Durability: Carbon fiber parts generally have a long service life because they are not susceptible to corrosion or fatigue. However, carbon fiber has relatively weak resistance to impact and may be damaged or even cracked once it is severely impacted.
Titanium:
Strength: Titanium is an extremely strong yet lightweight material used to manufacture advanced bicycle components. It has excellent strength and rigidity and is able to withstand high loads.
Durability: Titanium components are generally very durable and resistant to corrosion and fatigue. However, because titanium alloys are more expensive to manufacture, they are usually more expensive than other materials.
When choosing MTB Bike Single Chainwheel & Crank Set, cyclists need to weigh the advantages and disadvantages of different materials based on their needs, budget and riding environment. For example, if you are looking for lightweight and high performance, carbon fiber may be a good choice, while if you need higher strength and durability, steel or titanium alloy may be more suitable. At the same time, it is also necessary to pay attention to the manufacturing processes and quality control of different brands to ensure that the selected parts have excellent performance and reliability.