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f1x1e-
If you have the carbon SI crank then it’s BB30. There were plenty of BB30 caad8s, 7s, 6s.
Eyeballing the bottom bracket shell from below if you know what you are looking for will tell you. Or just pop the crank arm off and measure the spindle dia- IIRC the carbon SI crank has captive bolts. It’s one of the few good things about them :)
Howard
Would think BSA threaded; BB30 wasn't introduced till sometime during CAAD9 IIRC