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Universal Cycles -- Shimano FC-7900 Dura Ace Double Chainrings 10sp [Y1KY98030, Y1KY98010, Y1KY42000, Y1KY39000]
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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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Amazon.com : SHIMANO DuraAce-7900 2x10sp Chainring, 130BCD - 52t (B) : Bike Chainrings And Accessories : Sports & Outdoors
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