Shimano UN55 Bottom Bracket
Best reliable and durable component for everyday cycling needs.
A reliable, no-nonsense upgrade for classic drivetrains that prioritizes durability over modern complexity. The sealed cartridge design keeps maintenance to a minimum, making it an ideal choice for riders who value consistent performance and longevity in their daily cycling setup.
$30.00
Who it's for
- Cyclists seeking a long-lasting, reliable component for daily rides.
- Riders on a budget needing dependable performance without breaking the bank.
- Commuters and casual riders preferring minimal bike upkeep.
Who should skip it
- Performance-oriented cyclists upgrading to newer drivetrain technologies.
- Weight-conscious riders prioritizing lightweight components for racing or climbing.
- Strong riders or racers demanding maximum power transfer and rigidity.
Performance breakdown
Weather sealing
Sealed cartridge design keeps grit and grime out indefinitely.
Installation ease
Standard threading makes swapping this unit a straightforward shop task.
Rotational smoothness
Delivers a consistent, buttery spin that lasts for thousands of miles.
Durability
A legendary workhorse component that rarely fails under normal riding conditions.
Weight efficiency
Hollow spindle design sheds grams without sacrificing necessary structural integrity.
Compatibility
The gold standard for JIS square-taper crankset setups.
Key Specs
Spindle Type
JIS Square Taper
Shell Width
70mm
Thread Type
Italian
Bearing Type
Sealed Cartridge
Spindle Material
Steel
Compatibility
JIS Square-Taper Cranksets
Sealed
Yes
Water Resistant
Yes
Know before you buy
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Ask Metto anything about the Shimano UN55 Bottom Bracket before you decide.
