What is a "cog driver" on a BMX bike? ?

  • Thread starter Thread starter Laredo P
  • Start date Start date
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Laredo P

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On the DansComp website, when you're looking at complete wheelsets, the search options are 9t,10t,11t and cog driver... I guess I've confused cog drive with cassette... what are the differences? Why is "cog driver" a seperate option from 9,10,11t?
 
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