IRD QB55
Best durable component for demanding long term applications.
This is the gold standard for reviving or maintaining a classic square-taper drivetrain. While it lacks the modern stiffness of external bearing systems, its Japanese-engineered sealed bearings offer a level of buttery smoothness and long-term reliability that most contemporary components simply can’t match.
$38.00
Who it's for
- Cyclists seeking a robust and long-lasting bottom bracket for their bike.
- Riders prioritizing a fluid and unhindered power transfer to their drivetrain.
- Owners of classic or retro bicycles needing a high-quality replacement part.
- Commuters and all-weather riders who need components resistant to the elements.
Who should skip it
- Cyclists upgrading to contemporary cranksets will find this incompatible.
- Performance-focused riders looking to minimize every gram on their bicycle.
- Beginner mechanics without a full suite of specialized bicycle tools.
Performance breakdown
Bearing Smoothness
Japanese-engineered internals deliver a remarkably fluid, friction-free pedal stroke.
Build Durability
Robust steel construction stands up to years of heavy, daily riding.
Installation Ease
Standard BSA threading makes for a straightforward, frustration-free shop installation.
Weather Resistance
Sealed cartridge design effectively keeps grit and moisture out of internals.
Compatibility Range
Limited to JIS square taper setups, but perfect for classic builds.
Longevity
Tange manufacturing ensures this component outlasts most modern, disposable alternatives.
Key Specs
Standard
BSA
Shell Width
68mm
Spindle Interface
JIS Square Taper
Bearing Type
Cartridge
Country of Origin
Japan
Material
Steel
Know before you buy
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Ask Metto anything about the IRD QB55 before you decide.
