It's an 73mm, E type, FSA Platinum DH ISIS bottom bracket. The right cup is modified for an E-type front derailleur where a derailleur bracket connects to the right side with a ring between the right cup and shell, spacing the BB cup further out and the spindle is spaced back 2.5 mm on the drive side. As far as the BB cup width, it appears the left cup has not been pushed all the way on the cartridge.
Last edited by onespeedbiker; 08-26-12 at 09:07 PM.