The Shimano XT BB-MT801 Threaded MTB Bottom Bracket is engineered to deliver reliable and exceptionally smooth power transfer for your mountain bike. As a key component of the esteemed Shimano DEORE XT M8000 series, this HOLLOWTECH II bottom bracket combines high-quality sealed bearings with advanced sealing technology to ensure your cranks spin freely and efficiently, even in the harshest trail conditions.

• HOLLOWTECH II Technology: Integrates the bottom bracket axle with the right crank arm, optimizing stiffness, weight, and rotational efficiency for maximum power transfer.
• High-Quality Sealed Bearings: Features precision-sealed bearings that ensure smooth, consistent rotation and significantly enhance durability by keeping out dirt, water, and contaminants.
• Improved Sealing Performance: Upgraded seals offer superior protection against mud, water, and grime ingress, extending the bottom bracket’s lifespan and reducing maintenance needs.
• Threaded (BSA) Design: Provides a secure and robust fit into frames with English (BSA) threading (BC 1.37), ensuring a creak-free and reliable connection.
• Versatile Shell Width Compatibility: Designed to fit mountain bike frames with either 68mm or 73mm bottom bracket shell widths, with included spacers for precise adjustment.
• 24mm Spindle Compatibility: Perfectly matched for all Shimano HOLLOWTECH II mountain bike cranksets with a 24mm integrated spindle.
• Lightweight & Durable: Constructed with anodized aluminum cups and an aluminum centre tube, balancing light weight (approx. 84g) with the strength required for aggressive off-road riding.