Shimano Deore XT BB-MT800 Bottom Bracket
Best durable upgrade for mountain bikers seeking reliable drivetrain performance.
This is the gold standard for riders who prioritize reliability over flashy, proprietary standards. By sticking to a proven 24mm spindle design, it delivers buttery-smooth rotation and exceptional weather sealing. You sacrifice the marginal stiffness gains of oversized systems, but you gain a bulletproof interface that just works, ride after ride.
$36.90
Who it's for
- Mountain bikers seeking reliable performance in harsh trail conditions
- Performance-oriented riders who value efficiency and a frictionless feel
- Home mechanics looking for a hassle-free component upgrade
Who should skip it
- Cyclists who prefer using standard-sized bottom bracket wrenches
- Eco-conscious riders who prioritize fully rebuildable components
- Owners of modern oversized cranksets requiring different spindle standards
Performance breakdown
Bearing Longevity
Sealed construction keeps grit and moisture out for extended service life.
Installation Simplicity
Straightforward press-fit design makes swapping out old units remarkably easy.
Compatibility Range
Broad support for multiple shell widths and 24mm spindle standards.
Power Transfer Efficiency
Stiff, reliable interface ensures every pedal stroke translates directly to motion.
Weight Optimization
Lightweight build keeps rotational mass low without sacrificing structural integrity.
Weather Resistance
Robust seals perform consistently even in sloppy, wet trail conditions.
Key Specs
Weight
68.2 grams
Shell Width
92.0 mm
Shell Diameter
41.0 mm
Spindle Diameter
24.0 mm
Bottom Bracket Standard
BB92
Spindle Interface Type
Shimano Hollowtech II
Tool Interface Type
Press Fit Tool
Intended Use
Mountain Biking
Water Resistant
Yes
Ceramic Bearings
No
Know before you buy
Still have a question?
Ask Metto anything about the Shimano Deore XT BB-MT800 Bottom Bracket before you decide.
