SHIMANO XT BB-MT801 HOLLOWTECH II BOTTOM BRACKET

The Shimano XT BB-MT801 is a premium Hollowtech II threaded bottom bracket engineered for serious riders.

Featuring a 24 mm integrated bearing axle and compatible with both 68 mm and 73 mm English-threaded shells, it delivers exceptional compatibility across most modern cranksets. Superior sealing technology keeps contaminants out and extends bearing life, while optimised bearing geometry ensures smooth, efficient rotation with minimal friction. The result is crisp power transfer and reliable performance in all conditions. Built to Shimano's exacting standards, the BB-MT801 combines durability with lightweight construction—ideal for cross-country, trail, and all-terrain riding where dependable drivetrain performance matters.

Specification

• Use: MTB 
• Model: BB-MT801 / BB-MT801-K
• BB-Type: HOLLOWTECH II
• Threaded: BSA
• Shell diameter: BSA (BC 1.37)
• Mounting: Threaded (for chain case)
• Suitable tool adapters: TL-FC25 / TL-FC37

Size

• 68/73mm (BB-MT801)
  

Compatibility

• XT FC-M8100 / FC-M8120 / FC-M8130 / FC-M8000 / FC-T8000
• SLX FC-M7100 / FC-M7120 / FC-M7130 / FC-M7000
• FC-MT700
• FC-MT610
• FC-MT600

Material

• Aluminium

Weight

• 84g 

Contents

• 1 x Shimano XT Hollowtech II Bottom Bracket BB-MT801

We reserve the right to make changes to the product information contained on this site at any time without notice, including with respect to equipment, specifications, models, colours, materials and pricing. Due to supply chain issues, compatible parts may be substituted at any time without notice.

Weights are based off pre-production products at time of publication. Weights may vary in final production.