• T47a (asymmetrical) threaded BB cups for T47a frames and 30mm diameter spindle compatible cranks.
• Cups have internal bearings, and can be used in BB shells with widths from 77.5 - 79mm.
• Machined aluminum cups thread together directly into a Cervelo, Factor and Felt T47a BB shell.
• T47 external cup on the drive side
• T47 internal cup on the non-drive side