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.
