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XT BB-MT800 Bottom Bracket

5 out of 5 stars
1 Review
Current price: $20.56 Original price: $33.99
40% off
Color:BSA Threaded



Smooth spinning.

Keep your cranks turning smoothly with the Shimano XT BB-MT800 Bottom Bracket. Made with small ball bearings for impeccable rotation and strong seals to fend off muck, this bottom bracket is built to last. One could break out the measuring tools and power washers to wade into the XTR vs. XT debate, but in the end this one will save you some cash and keep you rolling down the trail with ease.

The Shimano XT BB-MT800 Bottom Bracket is compatible with threaded 68mm and 73mm shells.


  • Swap your worn bottom bracket for this worthy replacement
  • Threaded design promises fewer creaks
  • XT-level design is hardworking and friendly to your wallet
  • Item #SHI008U
[cups] aluminum, [bearings] steel
Shell Width
Crankset Compatibility
Hollowtech II
3 x 2.5mm spacers
Claimed Weight
2.9oz (82g)
mountain biking
Manufacturer Warranty
2 years

Overall Rating

5 based on 1 ratings

Review Summary

1 Stars - 0 reviews
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5 Stars - 1 reviews

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5 out of 5 stars

October 28, 2021

Cheap and Easy

These bottom brackets are tough but they do wear out over time, fortunately they are fairly inexpensive and easy to install. I've had both the XT and the XTR on my bikes and honestly, unless you are sponsored by Shimano or saving a couple of grams will make you feel better about your bike, the XT is more than enough. XT is like the F-150 (or Tacoma) of component line ups, maybe not the fanciest in the stable, but really good at most everything and incredibly dependable.

Barry R

Originally reviewed on Backcountry.com