Thread together bottom bracket for frames using the BBRight(TM) bottom bracket standard. Two machined aluminum cups thread together keeping the bottom bracket stable in the frame, increasing bearing life, and simplifying maintenance. This means no more creaking, smoother operation, longer bearing life, and really quick bearing replacement. Bottom Bracket Includes: BB Cups with bearings 2 - Silicone dust seals 2 - 0.5mm crank spindle spacers 2 - 1.0mm crank spindle spacers Specs- Bearings: Enduro Angular Contact Color: Black Bottom Bracket/Frame Interface: BBRight(TM) Press Fit Bottom Bracket Shell Width: 79mm Bottom Bracket Shell I.D.: 46mm Crank Spindle Diameter: 24.00mm Tool Pattern: 48.5mm x 16 notch Over Bearing Width: 91.5mm in 79mm wide shell* Weight: 146g Packaged for retail display * Over Bearing Width Dimensions include supplied silicone dust shields.