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Continue to ChatDura Ace 9000 mid-section of rear cassette is carbon bodied https://cycletechreview.com/2013/reviews/fenwicks-airtight-sealant/attachment/20130731_163427/
Dura Ace 9000 mid-section of rear cassette is carbon bodied https://cycletechreview.com/2013/reviews/fenwicks-airtight-sealant/attachment/20130731_163427/