The Shimano XT MT800 Bottom Bracket 68-73mm is engineered for durability and performance, featuring excellent seals that protect against wear and tear. This bottom bracket comes complete with essential components including spacers, an inner sleeve, and o-rings, ensuring a reliable fit for both 68mm and 73mm bottom bracket shells. Specifically designed for use with Shimano Hollowtech II cranksets, it provides a smooth and efficient pedaling experience. Please note that the TL-FC25 adapter is required for installation but is not included.