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About product and suppliers:
        Alibaba.com offers 13,557 k speed products. About 5% of these are speed reducers, 2% are gearboxes, and 1% are other roadway products. 

A wide variety of k speed options are available to you, such as road bike, mountain bike, and folding bicycle. You can also choose from 26", 20", and 24". As well as from aluminum alloy, aluminum, and steel. And whether k speed is worm, planetary, or helical. 

There are 13,726 k speed suppliers, mainly located in Asia. The top supplying countries are China (Mainland), India, and Hong Kong, which supply 98%, 1%, and 1% of k speed respectively. 

K speed products are most popular in North America, Southeast Asia, and Domestic Market. 

You can ensure product safety by selecting from certified suppliers, including 2,754 with ISO9001, 1,075 with Other, and 172 with ISO14001 certification.
        
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