Tongkin brand 68mm to 120mm electric bike torque sensor e bike bottom bracket torque sensor

Founded in 1991, Ningbo Sunrun Bicycle Co., ltd & Its branch company Ningbo Tongkin Technology Co., Ltd. are the professional manufacturer engaged in producing bicycle 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,Torque Sensor B.B sets, total 7 series and about 300 models.
Keeping ahead of the industry, every member of Sunrun has reagarded the perfect quality as the life. By adopting advanced technique such as high precision cold-forging figuration. numerial-control processing and heat treatment, Sunrun creates the complete bicycle transmission system parts with Sunrun own characteristic.
"Tongkin Technology, Intelligent Manufacture. Running bicycle world, Quality first! "

1. who are we?
We are based in Zhejiang, China, start from 2003,sell to South America(40.00%),Domestic Market(26.00%),Domestic Market(26.00%),Western Europe(14.00%),Western Europe(14.00%),Southeast Asia(13.00%),Southeast Asia(13.00%),Africa(7.00%),Africa(7.00%). There are total about 301-500 people in our office.

2. how can we guarantee quality?
Always a pre-production sample before mass production;
Always final Inspection before shipment;

3.what can you buy from us?
Bicycle Parts, E-Bicycle Parts

4. why should you buy from us not from other suppliers?
With more than 20 years R&D capability, we are the professional manufacturer engaged in producing bicycle transmission system & brake system parts. " Tongkin Technology, Intelligent Manufacture. Running bicycle world, Quality first! "

5. what services can we provide?
Accepted Delivery Terms: FOB,CIF,EXW；
Accepted Payment Currency:USD,EUR,CNY;
Accepted Payment Type: T/T,L/C,D/P D/A;
Language Spoken:English,Chinese