Origin8`s Revolvr T47 bottom brackets are designed to allow the use of a wide variety of spindle options in a T47 shellAvailable in two thread-in styles - outboard for 68/73mm shells or inboard for 85.5/86.5/92mm shellsMade with premium materials and bearings for dependable performance85.5/86.5/92mmT47BB386/BB392AlloyInboardBlack