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About product and suppliers:
        Alibaba.com offers 51,773 40mm wheel products. About 67% of these are car wheels, 2% are material handling equipment parts, and 1% are furniture casters. 

A wide variety of 40mm wheel options are available to you, such as plastic, alloy, and synthetic leather. You can also choose from furniture caster, wired, and wheel hub. As well as from free samples, paid samples. 

There are 51,773 40mm wheel suppliers, mainly located in Asia. The top supplying country is China (Mainland), which supply 100% of 40mm wheel respectively. 

0mm wheel products are most popular in North America, Western Europe, and Central America. 

You can ensure product safety by selecting from certified suppliers, including 4,754 with ISO9001, 4,425 with Other, and 2,871 with ISO/TS16949 certification.