e. 13 BB30 Bottom Bracket The e. 13 BB30 Bottom Bracket fits 30mm spindle e*thirteen cranks. It also features custom bearings designed for high performance, long lasting durability and smooth as butter spinning. It features a threaded center, which keeps the bearings properly aligned for a longer lasting life. Features Material: EXA+ Aluminum Compatibility: XCX, TRS, LG1 Bearings: Custom 6806 radial bearings BB Shell: 68/73 42mm pressfit Color: Black Weight: 123g | E. thirteen | Bb30 Bottom Bracket Bb30 Bottom Bracket