This adapter is required to install the Shimano Dura Ace R9100 Hollowtech II bottom bracket using a standard 44mm diameter 16-notch cup outboard BB tool like thePark Tool BBT-19.2.specs injection-molded nylon construction diameter: 39mm/44mm
This adapter is required to install the Shimano Dura Ace R9100 Hollowtech II bottom bracket using a standard 44mm diameter 16-notch cup outboard BB tool like thePark Tool BBT-19.2.
injection-molded nylon construction
diameter: 39mm/44mm
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