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Shimano Dura-Ace FC-7900 Chainrings (Silver/Black) (2 x 10 Speed) (130mm BCD) (Inner) (B-Type) (39T) - Performance Bicycle
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Universal Cycles -- Shimano FC-7900 Dura Ace Double Chainrings 10sp [Y1KY98030, Y1KY98010, Y1KY42000, Y1KY39000]
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Amazon.com : SHINAMO DURA-ACE FC-7900 CHAINRING 53 TEETH B-TYPE, SILVER / GREY (japan import) : Bike Chains : Sports & Outdoors
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