The Shimano Ultegra BB72 and BBR60 Hollowtech II Bottom Brackets are designed to be lightweight and have a new seal construction for smoother rotation. They require a TL-FC34 or an included TL-FC24 adaptor for installation and removal.
The Shimano Ultegra BB72 and BBR60 Hollowtech II Bottom Brackets are designed to be lightweight and have a new seal construction for smoother rotation. They require a TL-FC34 or an included TL-FC24 adaptor for installation and removal.
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