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Shimano Shimano - SM-BB52 - Bottom Bracket - Shell: BSA 68/73mm - Hollowtech (ESMBB52B) | Cartersville Bicycle Service & Supply
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Amazon.com : Thinvik Bottom Bracket, BSA 68-73mm English for 24mm Spindle Crank,Compatible with Shimano Crankset : Sports & Outdoors
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