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! "
