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Amazon.com : DJC Road Bike Chainring 110BCD Double Chainring 5 Arms Round 2X 50T 34T 53T 39T 52T 36T Gravel for Sram Red Rival S350 S900 (Round 50-34T) : Sports & Outdoors
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Amazon.com : SRAM Apex 1 Crankset - 165mm, 10/11-Speed, 42t, 110 Asymmetric BCD, GXP Spindle Interface, Black : Sports & Outdoors
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