Speed is the name of the game. The all-new Kogel Speed Kolossos for Shimano 12-speed Dura-Ace and Ultegra is engineered for the ultimate balance of aerodynamics, efficiency, and durability. Designed for riders who refuse to compromise, this oversized derailleur cage system is the fastest Kolossos ever, fine-tuned to shave watts and maximize drivetrain performance.

Featuring an ultra-sleek, speed-focused design, the Speed Kolossos is built with aerodynamic optimization that reduces drag while maintaining the crisp, precise shifting Shimano is known for. The custom-machined cage and oversized ceramic pulleys keep friction to an absolute minimum, ensuring every watt you put down goes straight to the road.

If you’re looking for a performance edge that saves energy where it matters most, the Speed Kolossos for Shimano 12-speed is your new secret weapon. Faster, smoother, and more efficient—because marginal gains win races.


Key points:

• Stiffer & More Aero: A refined shape inspired by our Aero Kolossos keeps things sleek and integrates perfectly with today’s modern road and gravel bikes.
• Larger 20-Tooth Lower Pulley: Bigger means lower friction, which means more speed. This is one of the biggest upgrades, improving chain efficiency and overall drivetrain smoothness.
• 12T Upper pulley
• Near universal road & gravel derailleur compatibility

Compatibility:

Shimano 12sp Dura-Ace and Ultegra derailleurs.  Backwards compatible with Shimano 11sp Dura-Ace and Ultegra derailleurs