Shimano Deore XT BB-MT800-PA Bottom Bracket — Press-Fit 89.5/92mm, HOLLOWTECH II

Shimano Deore XT BB-MT800-PA is a HOLLOWTECH II press-fit bottom bracket for 89.5 to 92 mm shells, with sealed bearings for smooth, durable performance.
Genuine Shimano Deore XT, brand new in retail packaging.
Will it fit? A press-fit bottom bracket for frames with a 41 mm inner diameter shell between 89.5 mm and 92 mm wide, which covers the BB86, BB89, BB91 and BB92 standards. Takes any Shimano HOLLOWTECH II 24 mm crank. Not for BSA threaded frames, that is the BB-MT801.
Key Specifications


Brand
Shimano


Series
Deore XT M8100


Model
BB-MT800-PA


MPN
IBBMT800PA


UPC
689228919969


Type
Bottom bracket, press fit


Frame interface
Press fit, PF41 (41 mm shell ID)


Shell width
89.5 to 92 mm (BB86 / BB89 / BB91 / BB92)


Spindle interface
24 mm HOLLOWTECH II


Included
3 x 2.5 mm spacers


Material
Aluminum and steel


Weight
68 g (2.4 oz)


Color
Black


Country of Origin
Japan


Condition
Brand new, original Shimano retail packaging


Technology Highlights


✓  Redesigned seals and bearings. Smaller balls than the previous XT generation cut rotating mass and friction, and the updated seals keep water and grit out.

✓  Covers four frame standards. One part fits BB86, BB89, BB91 and BB92 shells.

✓  Spacers included. Three 2.5 mm spacers in the box to set the chainline correctly.

✓  External bearing HOLLOWTECH II. Bearings sit outboard for a wider bearing span and better lateral stiffness under load.

✓  Light. Around 68 g, which is where a press-fit design earns its keep.

What's in the Box

1 × Shimano Deore XT BB-MT800-PA press-fit bottom bracket
3 × 2.5 mm spacers
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.