Theory American Bottom Bracket
Best durable upgrade for riders seeking smooth, reliable performance.
Upgrade your BMX frame's bottom bracket compatibility with this kit. It seamlessly bridges the gap between older American bottom brackets and modern 3-piece cranks, offering sealed bearing performance and versatility for various spindle sizes. A straightforward solution for enhancing your bike's drivetrain.
$34.95
at
Albe's BMX
More American Bottom Bracket options
Who it's for
- Riders seeking a resilient bottom bracket for their BMX or cruiser.
- Owners of classic bikes or BMX frames requiring an American bottom bracket.
- DIY enthusiasts and mechanics preferring uncomplicated component installation.
Who should skip it
- Performance-focused cyclists prioritizing minimal bike weight for speed and agility.
- Cyclists with newer bikes or those upgrading to current frame standards.
- Riders wanting the latest technology and broad component upgrade options.
Performance breakdown
Compatibility Range
Seamlessly adapts three common spindle sizes to older American frame standards.
Bearing Durability
Sealed contact bearings effectively resist grit and moisture during heavy riding.
Weight Efficiency
Lightweight aluminum cups shed unnecessary mass compared to traditional steel setups.
Installation Ease
Straightforward press-fit design simplifies the upgrade from one-piece crank systems.
Drivetrain Smoothness
Precision machining ensures minimal friction for a noticeably fluid pedal stroke.
Structural Rigidity
Robust construction provides a stable platform for aggressive BMX riding styles.
Key Specs
Bottom Bracket Standard
American to Mid
Compatibility
19mm, 22mm, and 24mm spindles
Material
Aluminum
Bearings
Sealed
Sealing Type
Contact Seals
Intended Use
BMX
Housing Material
Aluminum
Quantity
Sold in pairs
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Ask Metto anything about the Theory American Bottom Bracket before you decide.
