The latest standard introduced by Cannondale PF30A is used for its Super Six Evo and Slice Road frame with a non standard bottom bracket shell of 73 mm versus commonly 68 mm for road frames.n The "A" stands for Asymmetric. PF30A adds 5mm to the non-drive side of the BB shell. C-Bear PF30A CD 24MM Ceramic Bottom Bracket Features Diameter46 mm Width 79 mm (Road) MaterialPrecision CNC aluminium cups
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