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Shimano bb r60 ultegra 6800 bottom bracket english
shimano bb r60 ultegra 6800 bottom bracket english
Shimano bb r60 ultegra 6800 bottom bracket english
Hollowtech ii integrated bottom bracket uses a wider bearing placement and larger axle diameter for increased stiffness and efficiency hollowtech ii integrated bottom bracket seal design has minimal bearing interface ensuring smooth rolling and increased durability

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