Full ceramic, no lubrication, no seal drag. Speed and Aero cages available now, or upgrade the Speed or Aero Kolossos you already own.
Now available
The full system
Get the Kolossos Pulsar
Our fastest oversized pulley system. Pulsar runs ceramic balls in ceramic races rather than steel, so there is nothing to corrode and nothing to lubricate. In a standard bicycle bearing most of the drag comes from the lubricant and the seals. Take both away and a 30 second free spin on the lower wheel becomes standard.
Available now as a complete cage in Speed and Aero, for Shimano and SRAM AXS.
If you already ride a Speed or Aero Kolossos, you do not have to replace the cage. The full ceramic Pulsar wheels are sold as a replacement set that drops straight into the cage on your bike. Speed Kolossos takes the 20 tooth lower wheel, Aero Kolossos the 19 tooth. Shimano runs a 12 tooth upper, SRAM AXS a 14 tooth.
Race day
Fit them before your target event and take the lubricant and the seal drag out of the drivetrain.
Worn pulleys
Teeth like shark fins? Rebuild the cage you already have onto our fastest set of wheels.
Summer setup
Keep your sealed wheels for the wet months and run full ceramic once the roads dry out.
