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Shimano Dura-Ace FC-7900 Chainrings (Silver/Black) (2 x 10 Speed) (130mm BCD) (Outer)... - Y1KY98030 - In The Know Cycling
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dura ace 9000 chainring 11S road bicycle bike chain ring crankset 55T 54T 53T 52T 50T 42T 39T 38T 36T 34T|Bicycle Crank & Chainwheel| - AliExpress
Frame and Wheel Selling Services: 2010 Shimano Dura-Ace FC-7900 Hollowtech II crank set 53T/39T 172.5mm double 10-speed road
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