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Continue to ChatSRAM PC1091 PowerChain https://cycletechreview.com/2013/reviews/sram-force-cyclo-cross-groupset/attachment/20130207_102138/
SRAM PC1091 PowerChain https://cycletechreview.com/2013/reviews/sram-force-cyclo-cross-groupset/attachment/20130207_102138/