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Item # SHI008U

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  • BSA Threaded, One Size ($20.99)
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Item # SHI008U

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.

Tech Specs

Shell Width:
68 mm, 73 mm
Recommended Use:
mountain bike
Manufacturer Warranty:
2 years
Actual Weight:
BSA Threaded, One Size: 89g

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Buttery smooth spinning!

  • Familiarity: I've used it once or twice and have initial impressions

Got this BB to replace my old, not quite worn out but definitely needing some help, BB. The old one was also a Shimano, came on the bike lasted about a year or so through some gnarly riding, and since Shimano has always done well for me I selected this one as the successor. I honestly didn't expect much above and beyond the old one, figured this one was just a new version of the one I had, but man this BB is nice and smooth! Installed with 0 problems and works great with my M8000 crank set. For the price, you can't beat it!

Buttery smooth spinning!

Replaced a SRAM Howitzer

  • Familiarity: I've used it several times

The BB on my necro Pug was frozen. I tried to clean it up, keep it spinning, but my efforts were largely pointless.

Yes, Shimano makes a sweet sealed BB. I've ridden it a bit since I installed this. I'm not using the plastic insert since the Q on my bike is 100 mm, but otherwise, it spins freely. I've ridden in very dusty conditions as well as on briny beaches. The sealed cups and bearings are boss. Seriously, if you ride a fat-bike in anything, but the most benign conditions you need to step up the BB to sealed.