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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 Triple Chainwheel & Crank Set
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Ningbo Tongkin Technology Co., Ltd.
About SunRun

Ningbo Dongjin Technology Co., Ltd is China OEM MTB Triple Chainwheel & Crank Set Supplier and ODM MTB Triple 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

What is the performance difference between the MTB Triple Chainwheel & Crank Set's multi-speed sprockets and single-speed sprockets in mountain bikes?

The performance difference between the multi-speed sprocket and the single-speed sprocket of the MTB Triple Chainwheel & Crank Set in mountain bikes is mainly reflected in the following aspects:
Speed change range and adaptability:
Multi-speed sprockets offer a wider shifting range, allowing riders to adjust gear ratios for different terrain and riding needs. This means that whether climbing a steep hill or descending at high speed, the rider can find the right gear ratio to optimize riding efficiency.
Single-speed sprockets have only a fixed gear ratio and cannot be adjusted based on terrain or needs. It's better suited for certain types of riding, such as urban commuting or flat-road riding.
Gradeability:
When facing steep hills, the low gear of the multi-speed sprocket can provide greater torque, making it easier for the rider to climb. Riders can switch to a lower gear ratio to take the load off their legs and maintain a consistent speed.
A single-speed sprocket may struggle when climbing hills because the rider cannot adjust the gear ratio to relieve the load on the legs.
Downhill speed and control:
When going downhill, the multi-speed sprocket's high gear allows the rider to reach higher speeds and provides better control. The rider can adjust the gear ratio as needed to maintain a steady speed or accelerate.
Single-speed sprockets may limit a rider's speed when going downhill because the fixed gear ratio may not provide adequate speed range.
Maintenance and durability:
Multi-speed sprockets may require more frequent maintenance and adjustments because they have more gears and shifting mechanisms. Improper installation or adjustment may cause problems such as sluggish shifting or chain detachment.
Single-speed sprockets are relatively simple and easier to maintain. The lack of a shifting mechanism reduces potential points of failure, making it more durable.
Price and cost:
Generally speaking, multi-speed sprockets and cranksets will cost more than single-speed sprockets because they contain more parts and more complex technology.
Single-speed sprockets are relatively more affordable and suitable for cyclists with a limited budget.
Therefore, the performance difference between multi-speed sprockets and single-speed sprockets in mountain bikes is mainly reflected in the transmission range, climbing ability, downhill speed and control, maintenance and durability, and price and cost. Riders can choose the right sprocket type based on their needs and budget.