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

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


Brand
Shimano


Series
Deore XT M8100


Model
BB-MT801


MPN
IBBMT801B


UPC
192790605913


Type
Bottom bracket, external bearing


Frame interface
BSA / English threaded (1.37 in)


Shell width
68 mm or 73 mm


Spindle interface
24 mm HOLLOWTECH II


Tool required
Park Tool BBT-59.3 or equivalent


Material
Aluminum and steel


Weight
84 g (3.0 oz)


Color
Black


Country of Origin
Japan


Condition
Brand new, original Shimano retail packaging


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


Brand new in retail packaging. Ships from Ontario, California (US domestic) · Estimated delivery 3–5 business days · Free 30-day returns.