Shimano SM-BB9000 Dura-Ace Bottom Bracket
Best high performance upgrade for dedicated road cyclists seeking ultimate smoothness.
This is the gold standard for riders who prioritize drivetrain efficiency above all else. It sacrifices the lightweight, press-fit trends of modern frames for the rock-solid reliability of traditional threaded shells. You get a buttery-smooth rotation that feels noticeably faster, provided your frame is built to accommodate it.
$49.99
Who it's for
- All-weather cyclists seeking a maintenance-free and durable drivetrain component
- Weight-conscious road racers looking to optimize every gram of their build
- Performance-oriented riders who prioritize a silky and efficient pedaling feel
Who should skip it
- Home mechanics who prefer using their existing standard-sized workshop tools
- High-mileage touring cyclists carrying heavy gear over long distances
- Cyclists with modern frames or cranksets requiring 30mm spindle compatibility
Performance breakdown
Rotational Efficiency
Minimal drag ensures every watt of power reaches the drivetrain.
Weather Sealing
Advanced seals effectively block grit and moisture from sensitive internal bearings.
Installation Simplicity
Standard BSA threading makes setup straightforward for most home mechanics.
Durability
Built to withstand the high-torque demands of elite road racing.
Maintenance Accessibility
Serviceable bearings extend the lifespan well beyond disposable alternatives.
Compatibility
Strictly limited to English-threaded frames and 24mm Hollowtech II spindles.
Key Specs
Thread Spec
English (BSA)
Shell Width
68mm
Spindle Diameter
24mm
Spindle Interface
Shimano Hollowtech II
Bottom Bracket Standard
BSA Threaded
Intended Use
Road Cycling
Water Resistant
Yes
Serviceable Bearings
Yes
Ceramic Bearings
No
Know before you buy
Still have a question?
Ask Metto anything about the Shimano SM-BB9000 Dura-Ace Bottom Bracket before you decide.
