Shimano XTR SM-BB93 Bottom Bracket

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Installation service available in-store (installation fees apply).

The SHIMANO XTR SM-BB93 is a lightweight, durable Hollowtech II bottom bracket designed for MTB use. Built with precision bearings and improved sealing, it offers smooth rotation and long service life in challenging riding conditions. Compatible with BSA threaded frames and Hollowtech II cranksets.

Specifications

• Model: SM-BB93
• Series: XTR
• Thread Type: BSA (English)
• Shell Width: 68 mm / 73 mm
• Axle Type: Hollowtech II
• Intended Use: MTB
• Bearings: Steel, low-friction seals
• Includes: Bottom bracket cups, spacers, and fitting tools as specified by Shimano

Compatibility

• Fits Shimano Hollowtech II MTB cranksets, including XTR, Deore XT, SLX, and Deore series with 24 mm spindle