Free 2-Day Shipping on Orders Over $50

Detail Images

  • Shimano - Detail
  • Shimano - XT BB-MT800 Bottom Bracket - BSA Threaded
  • Shimano - Detail -

Current Color

  • Shimano - XT BB-MT800 Bottom Bracket - BSA Threaded

Shimano XT BB-MT800 Bottom Bracket

19% Off
sale $21.11 $25.99

Free 2-Day shipping on orders over $50. Learn More

Select style & size:

Select options
  • Select options
    • BSA Threaded, One Size
      sale $21.11

    9 Reviews


    Smooth spinning.

    If every bump in the trail means a creak from the center of your bike as of late, retire your old bottom bracket and replace it with the Shimano XT BB-MT800 Bottom Bracket. Shimano puts the best of its workhorse craftsmanship into this bottom bracket, using durable seals and small ball bearings that will keep your cranks spinning from flowy climbs to rugged descents with ease.

    • 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
    • Reviews
    • Q & A

    What do you think about this product?

    Have questions about this product?

    Shimano BB

    • Familiarity: I've put it through the wringer

    I replaced my dad's enduro bottom bracket with this one and it works great. He was able to get 2 seasons of riding with his old one, hopefully this one will last just as long.

    Solid Bottom Bracket

    • Familiarity: I've put it through the wringer

    One of the cheaper options out there, but keeps you spinning problem free for atleast as long as the slightly more expensive options

    An awesome upgrade.

    • Familiarity: I've used it several times

    The Bottom Bracket that keeps on spinning. After wearing out an older Shimano bottom bracket, the MT800 seemed like a logical upgrade. The smaller cups do require a special adaptor to install (this is included so installation with a regular BB tool is easy). So far, after nearly a month of hard riding and no maintenance, the BB still spins perfectly.

    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.

    Is this compatible with a vintage Cannondale M700 MTB frame? I have a '92 7-speed Cannondale currently fitted with a threaded square tapered BB, 68mm shell. I want to upgrade it to a 10 speed and put a Shimano XT M785 or a XTR M985 crankset on it. Will this Hollowtech BB fit the bill?

    Will this Bottom Bracket fit my 2016 S-Work Camber 650b?