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               Originally Posted by 
              nikroc  
              cush drives are the rubber 'shock absorbers' in the rear wheel housing. They sit
              within compartments as part of the rear hub.
 basically they wear and can cause snatchiness. Simple fix is to use old inner tubes to pack them out OR buy some made out of polyurethane ..
 HTH
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         Thanks for that nikroc, where's good for those polyurethane cush drives?
        
 Also, is the same place good for front and back chainset (my bike is now 7 years old and I should treat it to a new set)