They’re one unit now, not two. The number of parts is reduced, weight is reduced & efficiency has been radically increased. A combined FC/BB weight reduction of 30 grams. Hollowtech II allows the BB bearings to be spaced wider apart & the axle & bearings themselves to be larger.

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Bottom bracket SOLD SEPARATELY. 740 grams (With Integrated Bottom bracket) More Rigid Outboard Bearings Same "Q"-Factor As 7701