Description Bottoms up.
The Shimano MT800 Threaded Bottom Bracket uses smaller bearings like those found on XTR and Dura Ace bottom brackets for less drag, and better sealing means you get more time riding and less time creaking. It's designed for use with 24 mm spindles like those found on Deore XT M8000 Hollowtech II cranks.
Compatible with 68 mm and 73 mm English-threaded bottom bracket shells. Includes two 2.5 mm spacers and installation adapter for bottom bracket tools designed for standard 44 mm external diameter cups.
B-Stock - This product has one or more B-Stock units available. These units can be purchased at a discount (see option select). B-Stock units were returned from other customers and may have missing or damaged packaging materials. These units are otherwise as new. The full manufacturer warranty applies. Click Here for more information.
Reviews Ordered by Most Relevant First
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Shimano XT 800 BB
by jgusta
Cycling Enthusiast
Portland, Oregon
Most reliable, longest lasting BB at great price, especially if can run external 24mm BB. Last much longer than 30mm BB for myself on both bikes
Reviewed 6/30/2022
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Excellent product, easy to install.
by Chuck_E
Cycling Enthusiast
CA
Could not find a bike delivered until 5 months after purchase, so got a frameset and put a Fezzari Delano Peak together with XT and XTR components. This bottom bracket came just in time for me to start riding in early June.
Reviewed 7/15/2021
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Adapter Is Junk - but the bottom bracket is fine
by Mike Francisco
Cycling Enthusiast
Seattle
1 of 1 customers found this review helpful.
The adapter that comes with this bottom bracket is made of plastic. It barely fit into the larger diameter Park Tool BBT69.2, and I had to tap it into place with a rubber mallet to get it fully inserted. Next I tried to use a torque wrench to achieve the specified torque (35-50 nm, I used a torque wrench set to 360 in-lb), but the plastic tool slipped off the bottom bracket a couple of times and quickly became useless. I managed to get it installed, but I wouldn't recommend relying on the supplied adapter to achieve the proper torque. I had to cut the adapter out of BBT69.2 and ended up ordering another bottom bracket tool for future maintenance.
Reviewed 9/2/2019
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