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EuroBikeParts: Shimano Ultegra R8170 12s Di2 Hydraulic Disc Electronic Group, Shimano, SH-UL8170-Di2-Full
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Amazon.com: SHIMANO Ultegra ST-R8170/BR-R8170 Di2 Shift/Brake Lever and Hydraulic Disc Caliper - 2x12-Speed, Flat Mount, Black (Right/Rear) : Sports & Outdoors
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