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

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Ningbo Tongkin Technology Co., Ltd.
Ningbo Tongkin Technology Co., Ltd.
Founded in 1991, Ningbo Sunrun Bicycle Co., ltd & Its branch company Ningbo Tongkin Technology Co., Ltd. are the professional manufacturers engaged in producing

bicycle & e-bike transmission system & brake system parts

. The key products range include derailleur sets, freewheels, cassette sprocket, cassette hub, disc brake & V brake sets, chainwheel & crank set, E-bike torque sensor B.B sets, controller, motor, mid-motor, displayer and another E-BIKE series components, etc. total 10 series and about 300 models.
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Ningbo Tongkin Technology Co., Ltd.
Product Center

The top-of-the-line transmission kit provides a large transmission ratio range to adapt to complex terrain. At this point, nothing can limit a rider’s heart.

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Ningbo Tongkin Technology Co., Ltd.
  • Ningbo Tongkin Technology Co., Ltd.

    Cassette Sprocket

    CS-M834
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  • +
    Ningbo Tongkin Technology Co., Ltd.

    Displayer Control Panel

    DP-M5
  • +
    Ningbo Tongkin Technology Co., Ltd.

    Twist Shifter

    SL-E100
  • Ningbo Tongkin Technology Co., Ltd.

    Cassette Sprocket

    CS-M834
    +
  • +
    Ningbo Tongkin Technology Co., Ltd.

    Disc Brake

    SR-BR-D01
  • Ningbo Tongkin Technology Co., Ltd.

    Rear Derailleur

    RD-M310
    +
  • +
    Ningbo Tongkin Technology Co., Ltd.

    Crank Set

    EB01-2201
  • +
    Ningbo Tongkin Technology Co., Ltd.

    Bottom Bracket Torque Sensor

    BBTS-68-145
Ningbo Tongkin Technology Co., Ltd.
Ningbo Tongkin Technology Co., Ltd.
Why Choose Us

The transmission kit provides a large transmission ratio range to adapt to complex terrain. At this point, nothing can limit a rider’s heart.

  • Customization
    Customization

    We have a strong R&D team that can develop and produce products based on drawings or samples provided by customers.

  • Cost
    Cost

    We have two of our own foundries and processing plants, factory direct sales, high quality and low price.

  • Quality
    Quality

    We have our own laboratory and testing equipment to ensure product quality.

  • Capacity
    Capacity

    Our annual output exceeds 10 million sets of accessories, which can meet the needs of customers with different purchasing volumes.

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