The Crownring’s performance is a matter of mechanical and biomechanical alignment. While other non-circular rings attempt to 'smooth out' the pedal stroke into a single, static ratio, the Crownring leverages dual radii to dynamically shift the gear ratio throughout the downstroke. This transforms a static circular motion into a high-performance power pulse that aligns the mechanical load with the rider's natural power curve.

When a biological engine is integrated into a mechanical system, static physics are superseded by Kinetic Dynamics. On flat terrain, a 40T Crownring can match the real-world velocity of a 48T round ring by maximizing torque during the peak power phase and utilizing the resulting momentum to 'glide' through the recovery phase. It is a fundamental optimization of the entire rider-machine system.


Crownring lowers the demand where force is limited; the top of the stroke. Its second radius maximizes the greater power of the lower stroke. Crownring provides two ratios that work with you to best power through the resistances.

• More torque for uphill climb
• Higher radius for added speed
• Increases kinetic energy to subsequent strokes
  

Crownring is the only bicycle chainring that gives you maximum torque and greatest speed within the same stoke, all seamlessly without rider intervention or awareness.

• Lowers ratio to coincide with leverage decline.
• Reduces dead zone duration
• Maintains a usable ratio to the end of the stroke
  

The proof of Crownring's superiority is evident in its 40T version that matches speed and cadence with a 48T chainring. Crownring is smoother, and easier than any other unassisted bicycle drive.

• Smoother
• Easier
• faster
• Unassisted
  

Crownring can improve any bicycle that uses a direct drive crankset.

• Provides better performance for electric bikes
  
• Prolongs battery life for greater distance
• Fewer charge cycles increases battery lifespan
  

Crownring is faster, easier, with more natural comfort than any other available bicycle drive. It's not hard to prove. Riding is believing.


Combating climate change: The cheapest way to increase global bicycle participation is to make cycling more rewarding. By optimizing the rider's power, Crownring removes the physical barriers to daily cycling. More bicycles means fewer cars. The infrastructure is in place; the bikes are available. A Crownring in the box is all we need to get rolling.