Dura-Ace Bottom Bracket – Press Fit – HOLLOWTECH II – 86.5 mm shell width
With an advanced seal construction for smoother rotation, the Dura-Ace is still lightweight at 54 grams.
- Bottom bracket with small ball bearings for lightweight
- Advanced seal construction for smoother rotation
- Press Fit
- 86.5mm BB Shell Width
- 41mm BB Cup Diameter
- Inner cover







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