Profile Racing Spline Drive
Best durable upgrade for serious freestyle and race riders.
A precision-machined interface designed to adapt mountain bike drivetrains for multi-chainring setups. It balances lightweight aluminum construction with a reinforced steel core to ensure reliable power transfer under load.
$83.99
at
Profileracing
Who it's for
- Aggressive BMX riders seeking a long-lasting drivetrain component
- Weight-conscious racers looking to optimize their bike's performance
- Technical riders who demand a smooth and consistent pedal stroke
Who should skip it
- Cyclists using non-standard or 22mm crank spindle sizes
- Budget-focused builders looking for the most affordable drivetrain options
- Riders who prefer a wide variety of aftermarket sprocket designs
Performance breakdown
Material Durability
CNC machined 6061 aluminum offers exceptional resilience against trail impacts.
Power Transfer
Steel spline insert ensures minimal flex during aggressive pedaling efforts.
Weight Efficiency
Lightweight construction keeps rotational mass low for snappier acceleration.
Drivetrain Versatility
Easily adapts cranksets for double or triple chainring configurations.
Installation Compatibility
Requires specific Profile external bottom brackets, limiting universal frame fitment.
Chainring Compatibility
Standard 104/64 BCD sizing supports a vast array of aftermarket rings.
Key Specs
Material
6061 Aluminum with steel spline insert
Weight
74 grams
Bolt Circle Diameter
104/64 mm
Chainring Mount Type
4-bolt
Bottom Bracket Compatibility
Profile External (outboard) Euro
Intended Use
Mountain Biking
Know before you buy
Still have a question?
Ask Metto anything about the Profile Racing Spline Drive before you decide.
