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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

How does Shifter Transmission Group Set Series implement the concept of sustainable development?

Shifter Transmission Group Set Series has adopted a series of comprehensive and in-depth measures to implement the concept of sustainable development, aiming to ensure that products have a positive impact on the environment, society and economy throughout their life cycle.
First of all, from the product design stage, Shifter Transmission Group Set Series fully considers sustainable development factors. By adopting a modular design, this series of variable speed transmissions not only facilitate maintenance and upgrades, but also make it easier to recycle and reuse parts. In addition, in terms of material selection, priority is given to the use of renewable, recyclable or environmentally friendly materials to reduce dependence on limited resources and reduce environmental pollution.
In the production and manufacturing stage, Shifter Transmission Group Set Series actively adopts green production technology. Reduce energy consumption and waste emissions by introducing advanced production equipment and processes. At the same time, the company has also strengthened the monitoring and management of the production process to ensure product quality while minimizing the impact on the environment.
During the product use stage, the Shifter Transmission Group Set Series helps users reduce fuel consumption and operating costs with its efficient transmission performance and energy-saving design, achieving a win-win situation of economic and environmental benefits. In addition, the company also provides users with comprehensive technical support and after-sales services to ensure that the products can perform optimally during use and extend their service life.
Finally, during the product end-of-life phase, the Shifter Transmission Group Set Series also focuses on sustainable development. By establishing a complete recycling system, scrapped products are dismantled and recycled to achieve resource recycling. At the same time, companies are also actively researching new technologies and processes to improve recycling efficiency and resource utilization.
Therefore, by practicing the concept of sustainable development in all aspects of design, production, use and recycling, the Shifter Transmission Group Set Series not only improves the environmental performance and economic benefits of the product, but also promotes the green transformation and sustainable development of the entire automotive industry. made a positive contribution.