Old 05-15-02 | 10:43 AM
  #3  
martin
Bash US - We'll Bash You
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Joined: Mar 2002
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From: Florida
If you mean the plastic mounted on the spokes it is a spoke protector. It is made to protect the spokes if/when your chain flies off the large cog into the wheel.

It is a little insurance for the spokes when your derailleur gets out of adjustment.
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