Miche Evo Max MCBB204 BB86 24mm Bottom Bracket - 86.5 41mm Designed for frames using the BB86 road press-fit standard, the Evo Max MCBB204 supports a compatible Miche chainset with a 24 mm spindle inside an 86.5 41 mm bottom bracket shell. The wide frame shell positions the bearings farther apart than conventional narrow-shell systems. This creates stable spindle support and helps maintain drivetrain alignment during hard acceleration, climbing and sustained seated efforts. CNC-machined 7075-T6 aluminium cups provide accurate press-fit engagement without unnecessary bulk. Sealed cartridge bearings protect the internal rolling surfaces against water and contamination, supporting smooth operation with reduced servicing requirements. This model is intended specifically for an 86.5 mm wide shell with a 41 mm internal diameter. The shell diameter must be checked carefully because similarly wide 46 mm systems require a different Bottom Bracket. Features Designed for BB86 road frames with an 86.5 41 mm press-fit shell. Supports compatible Miche chainsets using a 24 mm spindle. Wide bearing stance helps maintain drivetrain stiffness and spindle alignment. CNC-machined 7075-T6 aluminium cups provide precise press-fit engagement. Sealed cartridge bearings help resist water and drivetrain contamination. Low 96 g weight avoids adding unnecessary mass to the drivetrain. Compatibility Compatible with: BB86 road frames with an 86.5 mm wide bottom bracket shell. Frame shells with a 41 mm internal diameter. Compatible Miche chainsets using a 24 mm spindle and requiring an Evo Max Bottom Bracket. This model is not compatible with 46 mm BB386EVO shells. Compatibility with Shimano Hollowtech II or other third-party 24 mm chainsets must be confirmed separately. Specifications Feature Specification Manufacturer Miche Product code MCBB204 Frame standard BB86 press fit Shell dimensions 86.5 41 mm Shell width 86.5 mm Shell diameter 41 mm Spindle diameter 24 mm Cup material CNC-machined 7075-T6 aluminium Bearing type Sealed cartridge bearings Weight 96 g Technical Notes Installation requires a suitable bearing press with correctly sized 41 mm cup drifts. The cups must be pressed into the frame squarely and evenly. Do not apply installation force through the cartridge bearing races. Inspect and clean the frame shell before installation. Professional installation is recommended for all press-fit Bottom Brackets.