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Ships within 48 hours · Estimated delivery Oct 28 - Nov 2
Stock pulleys come with cross seals only
Available in our Kratos sintered compounds that offer the best durability in wet environments and intense braking
Kogel's 12/14-tooth pulleys reduce chain articulation and friction
road bearings are ideal
Ground clearance remains similar to stock cage design
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,
