Shimano XTR BB93 Threaded MTB Bottom Bracket

The Shimano XTR SM-BB93 is a high-performance threaded bottom bracket, meticulously designed to complement Shimano's HOLLOWTECH II mountain bike cranksets, including the XTR FC-M9100 and FC-M9220 series. Engineered for reliability and low friction, the BB93 ensures your cranks spin smoothly and efficiently, translating every watt of power into forward motion, even in the most challenging trail conditions.

• HOLLOWTECH II Compatibility: Designed specifically for Shimano HOLLOWTECH II cranksets with a 24mm spindle, offering a precise and secure fit that maximizes stiffness and power transfer from your cranks to the drivetrain.
• Threaded (BSA) Design: Compatible with standard BSA (English thread) bottom bracket shells, fitting both 68mm and 73mm shell widths common on most mountain bike frames. Spacers are included for proper installation.
• Lightweight Construction: As an XTR-level component, the SM-BB93 is remarkably lightweight (approximately 73g, including spacers), helping to shave crucial grams from your build without compromising performance or durability.
• Precision-Sealed Bearings: Features high-quality, precision-sealed bearings that minimize friction for incredibly smooth rotation. These advanced seals also provide superior protection against dirt, mud, and water ingress, significantly extending the lifespan and consistent performance of the bottom bracket in rugged off-road environments.
• Durable Anodized Finish: The external cups boast a durable black anodized finish, ensuring longevity and maintaining a premium aesthetic even after extensive use in harsh conditions.
• Easy Installation & Maintenance: Designed for straightforward installation and maintenance with standard bottom bracket tools (TL-FC24 adapter required for some tools, which is often included or sold separately).