Miche Evo Max MCBB205 BB386EVO 24mm Bottom Bracket - 86.5 46mm Developed for BB386EVO frames, the Evo Max MCBB205 provides the integrated bearing interface required to run a compatible Miche chainset with a 24 mm spindle in an 86.5 46 mm press-fit shell. The wide shell places the bearings across a broad stance, helping support the spindle against movement under heavy pedalling loads. Accurate bearing alignment promotes efficient power transfer and dependable drivetrain performance during climbing, sprinting and sustained high-output riding. CNC-machined 7075-T6 aluminium cups deliver the dimensional accuracy needed for secure press-fit installation while keeping the complete assembly to approximately 94 g. Sealed cartridge bearings help protect the rolling surfaces against water and contamination. This Bottom Bracket is specific to an 86.5 mm wide shell with a 46 mm internal diameter. It must not be confused with the 41 mm BB86 version, despite both standards using the same nominal shell width. Features Allows a compatible 24 mm Miche chainset to be installed in a BB386EVO frame. Wide bearing stance provides stable spindle support under pedalling load. Integrated bearing and conversion interface simplifies the drivetrain installation. CNC-machined 7075-T6 aluminium cups provide accurate press-fit engagement. Sealed cartridge bearings help resist water, dirt and drivetrain contamination. Approximately 94 g weight maintains a lightweight drivetrain assembly. Compatibility Compatible with: BB386EVO frames with an 86.5 mm wide bottom bracket shell. Frame shells with a 46 mm internal diameter. Compatible Miche chainsets using a 24 mm spindle and requiring an Evo Max Bottom Bracket. This model is not compatible with 41 mm BB86 shells. Compatibility with Shimano Hollowtech II or other third-party 24 mm chainsets must be verified against the chainset manufacturer's requirements. Specifications Feature Specification Manufacturer Miche Product code MCBB205 Frame standard BB386EVO press fit Shell dimensions 86.5 46 mm Shell width 86.5 mm Shell diameter 46 mm Spindle diameter 24 mm Cup material CNC-machined 7075-T6 aluminium Bearing type Sealed cartridge bearings Weight 94 g Technical Notes Installation requires a suitable bearing press with correctly sized 46 mm cup drifts. The cups must be pressed into the frame squarely and evenly. Do not apply installation force through the cartridge bearing races. Confirm the frame uses a full 86.5 46 mm BB386EVO shell before installation. Professional installation is recommended for all press-fit Bottom Brackets.