• Blackspire DeCognition Rear Cassette Reducer

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Blackspire DeCognition Rear Cassette Reducer

This cassette adaptor is ideal for riders who would like to reduce their gearing ratio to save weight or to discard unused gears. Ideally designed for Downhill riding where the larger sprockets are not used as often.


  • 9 speed cassettes convert into 6 speed cassettes
  • 10/11 speed cassettes convert into 7 speed cassettes

Buy Blackspire Components from Chain Reaction Cycles, the World’s Largest Online Bike Store.

  • Delivery costFREE
  • Delivery toUSA
  • 365 Days return or exchange

    If you're not completely satisfied with an item you may return it within 12 months of purchase. We'll give you a full refund if the item hasn't been used or the component hasn’t been fitted.

    More information on returns
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Buying Guide

  • We've got everything you need to know in our buying guide.