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About product and suppliers:
        Alibaba.com offers 7,193 bicycle stem products. About 31% of these are bicycle, 17% are bicycle stem, and 16% are other bicycle parts. 

A wide variety of bicycle stem options are available to you, such as aluminum, steel, and aluminum alloy. You can also choose from 31.1 - 32.5mm, 32.6 - 35mm, and 20 - 22.5mm. As well as from 26 - 35mm, 15 - 25mm, and 36 - 45mm. And whether bicycle stem is paid samples, or free samples. 

There are 7,275 bicycle stem suppliers, mainly located in Asia. The top supplying countries are China (Mainland), Taiwan, and Australia, which supply 98%, 1%, and 1% of bicycle stem respectively. 

Bicycle stem products are most popular in North America, Western Europe, and Southeast Asia. 

You can ensure product safety by selecting from certified suppliers, including 1,296 with ISO9001, 189 with Other, and 41 with ISO14001 certification.