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Amazon.com : JGbike ~180g Lightweight 11 Speed Single Piece Cassette for Road Gravel cyclecross Bike, for Shimano Dura Ace Ultegra or SRAM Red Force for Triathlon - The Best Value Cassette Available :
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Actual Weights: Fair Wheel Bikes weighs the new Shimano Dura-Ace R9200 Di2 Wireless 12 Speed Group - Bikerumor
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