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Designed exclusively for the Kolossos Oversized Derailleur Cage
or a MTB CROSS 73mm frame
For current carbon road and gravel frames
The custom-machined cage and oversized ceramic pulleys keep friction to an absolute minimum
Silky smooth shifting in an aero-optimized package for those looking to maximize their efforts on the bike
Oversized Derailleur Pulleys for Shimano Ultegra R8100 - Full Ceramic - 12/14T cranktype-Campagnolo Designed exclusively for the KolossosWant to run that oversized pulley look, but without rebuilding your derailleur? These pulleys fit on your stock cage. Oversized pulleys fit the latest generation of Shimano derailleurs: Dura Ace R9100, Ultegra R8000 R8100 and 105 R7000. By using the standard cage on your Shimano derailleur, you will feel the benefits of reduced articulation in the chain, while retaining accurate shifting. Something that has been a negative side effect of many large
