Shimano Deore XT BB-MT801 Bottom Bracket — BSA Threaded 68/73mm, HOLLOWTECH II, Mountain Bike

Shimano Deore XT BB-MT801 is a HOLLOWTECH II threaded (BSA, 68/73 mm) mountain bottom bracket with sealed bearings for smooth, durable performance.

Genuine Shimano Deore XT, brand new in retail packaging.

Will it fit? A BSA (English) threaded bottom bracket for 68 mm or 73 mm shells, taking any Shimano HOLLOWTECH II 24 mm mountain crank (XT, SLX, Deore and compatible). Note: installation needs a Park Tool BBT-59.3 or equivalent, as these cups take a smaller tool than a standard bottom bracket.

Key Specifications

Technology Highlights

• ✓ XTR technology at XT level. The MT801 inherits the flagship design, so it runs lighter and with less bearing drag than the previous XT bottom bracket.
• ✓ Improved seals. Updated sealing keeps mud and grit out, which is what actually determines how long a bottom bracket lasts.
• ✓ Smaller ball bearings. Finer bearings improve rotation and reduce drag.
• ✓ External bearing HOLLOWTECH II. Bearings sit outboard of the shell for a wider bearing span, which means better lateral stiffness under pedalling load.
• ✓ Fits 68 or 73 mm shells. One part covers both standard threaded mountain frame widths.

What's in the Box

• 1 × Shimano Deore XT BB-MT801 bottom bracket (drive and non-drive cups)
• Spacers and documentation as supplied
• Original Shimano retail packaging