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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 Shifter Transmission Group Set Series
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Ningbo Tongkin Technology Co., Ltd.
About SunRun

Ningbo Dongjin Technology Co., Ltd is China OEM Shifter Transmission Group Set Series Supplier and ODM Shifter Transmission Group Set Series 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

What are the performance advantages of Shifter Transmission Group Set Series?

The performance advantages of Shifter Transmission Group Set Series are mainly reflected in the following aspects:
1. Excellent transmission performance:
This series of variable speed transmission devices adopts advanced transmission technology, making the transmission process faster and smoother. Whether accelerating or decelerating, smooth transitions can be achieved, which greatly improves driving comfort and vehicle driving stability.
Precise transmission control also ensures that the engine always works in the optimal efficiency range, thereby improving the vehicle's power performance and fuel economy.
2. High transmission efficiency:
Shifter Transmission Group Set Series reduces the loss of energy during transmission by optimizing the transmission structure, allowing more power to be directly transmitted to the wheels and improving transmission efficiency.
This high-efficiency transmission efficiency not only improves the vehicle's power response speed, but also helps reduce fuel consumption and emissions, meeting the environmental performance requirements of modern vehicles.
3. Durability and reliability:
The material selection, structural design and production process of this series of variable speed transmission devices have been strictly controlled to ensure the durability and reliability of the product.
Even in harsh driving environments and extreme working conditions, the Shifter Transmission Group Set Series can maintain stable working performance, reduce failure rates and maintenance costs, and provide users with long-term use guarantee.
4. Intelligence and adaptability:
This series of variable transmission devices are usually equipped with advanced control systems that can intelligently adjust according to different driving environments and needs, making the transmission process more flexible and precise.
Whether it is city roads or highways, whether it is low-speed cruising or high-speed overtaking, the Shifter Transmission Group Set Series can respond quickly and provide the best driving experience.
Therefore, the Shifter Transmission Group Set Series shows significant performance advantages in terms of transmission performance, transmission efficiency, durability and reliability, as well as intelligence and adaptability, providing users with an excellent driving experience and efficient energy transfer solutions. .