Origin8 Revolvr Eccentric BSA Bottom Bracket
Best conversion solution for single speed riders with vertical dropouts.
This component allows for precise chain tensioning on frames without horizontal dropouts, making single-speed or fixed-gear conversions straightforward. It offers a generous adjustment range while maintaining compatibility with common spindle standards, providing a clean, reliable solution for custom builds.
$122.19
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Who it's for
- Cyclists seeking a clean aesthetic for single-speed conversions
- Home mechanics who prefer using their existing toolsets
- Commuters and trail riders requiring a dependable drivetrain setup
Who should skip it
- Riders who prefer simple, set-and-forget mechanical components
- Cyclists sensitive to drivetrain noise and frequent maintenance
- Enthusiasts wanting to use oversized 30mm spindle cranksets
Performance breakdown
Conversion Versatility
Seamlessly transforms standard frames into single-speed setups without horizontal dropouts.
Adjustment Precision
The 14mm range offers ample room for perfect chain tensioning.
Build Quality
CNC-machined AL6061 aluminum construction ensures long-term durability and structural integrity.
Spindle Compatibility
Dual support for HTII and GXP standards covers most popular cranksets.
Installation Ease
Includes all necessary hardware, though eccentric adjustments require patience and precision.
Bearing Reliability
Sealed bearings provide smooth rotation and solid protection against trail debris.
Key Specs
Material
CNC machined AL6061
Shell Compatibility
BSA (1.37" x 24tpi x 68/73mm)
Spindle Compatibility
HTII and GXP
Adjustment Range
14mm total (7mm each direction)
Sealed Bearings
Yes
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