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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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Shimano Ultegra Di2 ST-R8170 + BR-R8170 Hydraulic Disc Brake – STI + Caliper – Flat Mount – Set Left and Right - BikeIn
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Shimano Ultegra ST-R8170/BR-R8170 Di2 Disc Brake/Lever Set - Bike Doctor | Mid-Atlantic Bicycle Shops
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