WHEELS Mfg Eccentric Bottom Bracket
Best drivetrain upgrade for single speed riders seeking quiet performance
This is the definitive solution for converting a modern frame into a reliable single-speed rig without the need for a dedicated tensioner. By replacing plastic alternatives with precision-machined aluminum and high-quality angular bearings, it trades a bit of installation complexity for a drivetrain that is significantly stiffer, smoother, and built to last.
$204.00
Who it's for
- Single-speed riders converting standard frames to a simplified drivetrain
- Performance-oriented cyclists seeking reliable, American-made hardware for their builds
- Riders tired of persistent mechanical noises during high-torque efforts
Who should skip it
- Home mechanics looking for a quick and simple installation process
- Weight-conscious racers prioritizing the lightest possible build for climbing
- Cyclists using extreme gear ratios requiring significant chain slack take-up
Performance breakdown
Build Quality
Precision-machined aluminum cups offer superior rigidity over standard plastic alternatives.
Bearing Smoothness
Enduro angular contact bearings deliver exceptionally low-friction rotation under load.
Weather Resistance
Double lip seals and high-fill grease effectively repel grit and moisture.
Serviceability
Fully serviceable design allows for easy maintenance and extended component life.
Chain Tensioning
Provides a reliable, stable 12mm adjustment range for single-speed setups.
Installation Complexity
Requires specific mechanical knowledge to dial in the eccentric positioning correctly.
Key Specs
Bottom Bracket Standard
PressFit 30
Shell Diameter
46 mm
Shell Width
73 mm
Spindle Diameter
24 mm
Spindle Interface
Shimano Hollowtech II
Weight
182 g
Material
Aluminum
Bearing Type
Enduro Angular Contact
Sealing Type
Double Lip Seals
Serviceable Bearings
Yes
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