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

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Pedal Assist E-Bike Kit Factory
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Pedal Assist E-Bike Kit Manufacturer

In order to adapt to the product upgrading and development needs of bicycle and electric bicycle market, our company has invested a lot of scientific research funds, recruited senior engineers and technicians in the industry, and set up a project to develop high-tech centre shaft torque sensor and its supporting peripheral products after market research and analysis of key components of the transmission system of bicycles and electric-assisted bicycles, which include: centre shaft torque sensor, hub Motor, controller, hand control panel display, special split five-jaw (four-jaw) disc crank and multi-stage khaki (hub) flywheel, transmission system.
After more than 2 years of dedicated research and development, sampling, small batch trial production, professional testing, improved design, simulated road test and actual mountain-climbing riding test, the entire torque transmission control drive system has entered the batch production stage.
Ningbo Tongkin Technology Co., Ltd.
About SunRun

Ningbo Tongkin Technology Co., Ltd. is a China Pedal Assist E-Bike Kit Manufacturer and Pedal Assist E-Bike Kit Factory, 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.


Pedal Assist E-Bike Kit Industry knowledge

What details do you need to pay attention to to ensure safety when installing the Pedal Assist E-Bike Kit?

When installing the Pedal Assist E-Bike Kit, it is important to ensure safety. Here are some details to note to help you complete the installation process safely and smoothly:
1. Preparation work
Before starting the installation, please make sure you have read the product manual in detail and understand the names and functions of all parts. At the same time, prepare the required installation tools, such as screwdrivers, wrenches, etc., and make sure they are in good condition. Also, choose a spacious, flat, and well-ventilated work area so that you can perform the installation comfortably.
2. Check the status of the bicycle
Before installing the Pedal Assist E-Bike Kit, please check that your bike is in good working order. Make sure that the bicycle's frame, brake system, tires and other components are not damaged or worn to ensure safe riding after installation.
3. Debugging and testing
After the installation is complete, please debug and test. First, check that all parts are installed correctly and are not loose or falling off. Then, turn on the power and test the working status of the motor, control system and braking system. During the test, please pay attention to whether there are any abnormal sounds, vibrations or heating. If there are any abnormalities, please stop using it immediately and contact a professional for maintenance.
4. Pay attention to electrical safety
Since the Pedal Assist E-Bike Kit involves electrical components, special attention should be paid to electrical safety during installation. Make sure the power cord and controller cord are firmly connected and well insulated, and avoid exposed wires coming into contact with metal parts or the human body. At the same time, avoid using sharp tools or objects during installation to avoid scratching or damaging wires and electrical components.
5. Follow professional guidance
If you feel unsure or encounter difficulty with the installation process, it is recommended to seek professional help and guidance. They have extensive experience and expertise to ensure a safe and correct installation process.
In short, it is crucial to ensure safety during the installation of the Pedal Assist E-Bike Kit. By doing preparations, checking the condition of your bike, carefully installing the battery and motor, performing tuning and testing, paying attention to electrical safety, and following professional guidance, you will be able to complete the installation process safely and smoothly and enjoy the benefits of electric-assisted riding. Have fun.