There are adapters that will allow select BB30 cranks for English threaded (BSA) frames.

Rotor has UBB (Universal BB)


Bdop has T30


Rotor cranks (e.g. 3D30, 3D+), SRAM BB30 MTB cranks, and Cannondale SL cranks with MTB axles can be used.

Note: It is important to have the longer axle. Both BB30 and BSA shell width is 68 mm (road frames). But BB30 frames have bearings inside the shell, thus BB30 road cranks have shorter axles than modern road cranks (24 mm axles) for BSA which use external bearing cups.

You can contact BDop (Bob Dopolina), who is a member of this forum, for further questions you may have.