Delivery in 4-5 business days (Europe)
For all those looking for maximum performance! Oversized derailleur pulleys were not the last step to achieve maximum performance. Kolossos Aero protects your pulleys and chain from the wind and thus reduces aerodynamic drag. The Aero Kolossos cage is CNC machined from aluminium with an internal skeleton, Kogel ceramic bearings and road seals, resulting in less friction and more efficient power transfer.
Main advantages
- Reduced aerodynamic drag
- Reduced friction while maintaining shifting accuracy
- Kolossos is 3x stiffer than competing products and 2x stiffer than the original pulley cage on your derailleur
- Long tooth profile on the lower pulley for better chain grip
- Ceramic bearings in the pulleys for even lower friction
- Choice of two colour variants
Compatibility: Shimano road derailleurs: Ultegra R8000 11-speed (Di2 and mechanical), Dura-Ace R9100 11-speed (Di2 and mechanical), Ultegra R8100 12-speed Di2 and Dura-Ace R9200 12-speed Di2. Pulleys: 12 teeth (upper) and 19 teeth (lower).
