Shimano XTR SM-BB94-41A Press-Fit Bottom Bracket | 89.5/92mm
Bottom Brackets
Shimano XTR SM-BB94-41A Press-Fit Bottom Bracket - 89.5/92mm
Shimano XTR SM-BB94-41A Press-Fit Bottom Bracket | 89.5/92mm
Weight and bearing quality. Read the overview
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Overview
What Does the XTR SM-BB94-41A Give You Over the XT Version?
Weight and bearing quality. At 58 grams this is the lightest press-fit bottom bracket Shimano makes for a 41 mm shell, 18.5 grams lighter than the SM-BB91-41A it replaced, and about 10 grams under the Deore XT BB-MT800-P. It also carries a revised seal construction that Shimano built for smoother rotation without giving up weather protection, which is the trade most lightweight bottom brackets get wrong.
Fitment is identical to the XT unit: a 41 mm press-fit shell at 89.5 mm or 92 mm width, with 24 mm Hollowtech II spindle compatibility that also covers FSA MegaExo, Race Face EXI, and Surly OD cranks. Three 2.5 mm spacers are included for setting chainline across shell widths. This is the XTR M9000 series part, so it is the one to buy if you are building light and want the bearing to last more than a season. Installation needs a press and removal needs a bearing puller.
All the specs
- MPN
- ISMBB9441A
- Model
- SM-BB94-41A
- Series
- XTR M9000
- Type
- Press-fit
- Bottom bracket shell inner diameter
- 41 mm (PF41)
- Shell width
- 89.5 mm or 92 mm
- Frame interface
- BB89.5, BB92
- Spindle interface
- 24 mm Hollowtech II
- Crank compatibility
- Shimano Hollowtech II, FSA MegaExo, FSA MegaExo Light, Race Face EXI, Surly OD
- Bearings
- Sealed cartridge, revised seal construction
- Weight
- 58 g
- Color
- Black
In the box
- 3 x 2.5 mm spacers
Good questions
Get to know Shimano
There's more to Shimano than this one product. Our Shimano page has the full Shimano lineup we carry and more about the brand.
Visit the Shimano page →How do I know if this fits my frame?
Measure your bottom bracket shell. If the inner diameter is 41mm and the width is 89.5mm or 92mm, this is the correct part. That combination is commonly labeled BB92. If your shell is threaded, you need the SM-BB93 instead.
How much does it weigh?
58g, which is 18.5g lighter than the SM-BB91-41A it replaced and roughly 10g under the Deore XT BB-MT800-P.
Is it worth the step up from the Deore XT version?
Fitment and crank compatibility are identical. You are paying for 58g instead of 68.2g and a revised seal construction Shimano designed for smoother rotation. If weight is not a priority, the XT unit fits exactly the same frames.
Will this work with non-Shimano cranks?
Yes. It is built for 24mm Hollowtech II spindles, which also covers FSA MegaExo, FSA MegaExo Light, Race Face EXI, and Surly OD cranks using the same 24mm standard.
Can I install this myself?
Not by hand. Press-fit cups need a proper bottom bracket press to install squarely and a bearing puller to remove. Installing them with anything else risks damaging the frame shell.
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