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Ships within 48 hours · Estimated delivery Aug 20 - Aug 25
Stock pulleys come with cross seals only
Choose road bearings for road bikes
The Aero Kolossos is equally at home in road and crit racing
Available in our Kratos sintered compounds that offer the best durability in wet environments and intense braking
Aero Oversized Derailleur Cage - Shimano Dura Ace R9100 & Ultegra R8000 CERAMIC OVERSIZED DERAILLEUR PULLEYS Stock pulleys come with crossBig pulley wheels were not the final step to free speed. Kolossos now comes in Aero, shielding your wheels and chain from the wind for those riders looking for maximum output. Aero Kolossos is built with Kogel ceramic bearings and road seals. Fully built in CNC machined aluminum with an internal spine for maximum stiffness, Aero Kolossos will help you cut through the wind as well as help you maintain shifting accuracy. When it comes to marginal gains,
