Its 24 mm bearings (Hollowtech II) provide an optimum stiffness-to-weight ratio and rotational efficiency. The SM-BB52 BSA bottom bracket is available in a version for 68 and 73 mm shell widths and in a version for 83mm shell widths.

SPECS

• Application: Cross Country, City & Touring, Freeride, Downhill
• Type: BSA
• Shell Width: 68 mm, 73 mm, 83 mm
• Axle Diameter: 24 mm (Hollowtech II)
• Bearings: Steel
• Bottom Bracket Cup Material: Aluminium
• Bottom Bracket Centre Tube Material: Resin

FEATURES

• Painted bearing cups
• High drivetrain efficiency
• Improved sealing and smoother movement
• Recommended for ZEE FC-M640, FC-M645 / Deore FC-M591, FC-T611, FC-M610, FC-M612, FC-M615, FC-M617, FC-M6000, FC-T6010 / Alivio FC-M4050, FC-M4060, FC-T4060 / FC-M552-L, FC-M552-S, FC-M622, FC-M625, FC-M627, FC-MT500, FC-MT200, FC-T551