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Amazon.com : SHIMANO,50/34 Teeth,IFCR7000MX04L 105 FC-R7000 105 Double chainset, HollowTech II 160 mm 50 / 34T, Black : Sports & Outdoors
Shimano 105 Di2 (R7170) vs Ultegra Di2 (R8170) 12-speed Groupset Review - mr. MAMIL
