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About product and suppliers:
        Alibaba.com offers 1,665 four wheels bicycle products. About 46% of these are bicycle, 16% are ride on car, and 4% are tricycles. 

A wide variety of four wheels bicycle options are available to you, such as tandem bike, kids' bike, and folding bicycle. You can also choose from 18", 16", and 12". As well as from steel, aluminum, and carbon fibre. And whether four wheels bicycle is yes, or no. 

There are 1,671 four wheels bicycle suppliers, mainly located in Asia. The top supplying countries are China (Mainland), United States, and Philippines, which supply 99%, 1%, and 1% of four wheels bicycle respectively. 

Four wheels bicycle products are most popular in South America, Western Europe, and North America. 

You can ensure product safety by selecting from certified suppliers, including 181 with ISO9001, 101 with Other, and 17 with ISO14001 certification.