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Shimano 105 FC-RS520 Crankset - 12-Speed - 50/34t - 110 Asymmetric BCD - Hollowtech II Spindle Interface - Black, 170 - My Bike Shop
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Amazon.com : Shimano 105 RD-5701-SS Rear Derailleur - 10 Speed, Short Cage, Black : Rear Bike Derailleurs : Sports & Outdoors
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