Kogel Bearings Aero Kolossos Oversized Cage Shim R9200 - Blk

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The Aero Kolossos offers reduced friction, improved shifting accuracy, and better chain retention

Includes pulleys with ceramic balls and steel races

Long tooth profile on lower pulley for best chain retention

Chain catcher on lower pulley to prevent chain jams

Ride it on-road and off-road without restrictions