Niner Bio-Centric EBB
Best quiet chain tensioning solution for dedicated single speed mountain bikers.
This eccentric bottom bracket offers a clever, tensioner-free way to dial in chain slack on single-speed setups. It’s a simple, effective solution for riders who want to fine-tune their geometry or drivetrain without adding extra hardware.
$69.99
at
Cambria Bike
Who it's for
- Single-speed riders seeking a clean and hassle-free drivetrain setup
- Cyclists who value a silent and reliable riding experience
- Technical riders looking to fine-tune their bike's handling characteristics
Who should skip it
- Owners of non-Niner frames looking for universal bottom bracket solutions
- Home mechanics who prefer simple, standard threaded components
- Weight-conscious racers prioritizing the lightest possible build
Performance breakdown
Tensioning Precision
Infinite adjustment range makes dialing in chain tension incredibly intuitive.
Weight Efficiency
Lightweight alloy construction keeps rotational mass low without sacrificing structural integrity.
Installation Simplicity
Requires specific tools, but setup is straightforward for experienced home mechanics.
Maintenance Ease
Periodic cleaning prevents creaking and keeps the eccentric mechanism moving smoothly.
Compatibility Range
Strict 55mm shell requirement limits this to specific Niner frames.
Drivetrain Versatility
Seamlessly converts geared frames to clean, reliable single-speed setups.
Key Specs
Material
Alloy
Shell Diameter
55mm
Shell Width
68mm
Know before you buy
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Ask Metto anything about the Niner Bio-Centric EBB before you decide.
