Kogel Kolossos Oversized Derailleur Cage For GRX 12sp



Ready to experience total drivetrain optimization? Introducing Kogel Kolossos bringing low friction and precise shifting to GRX 12-speed gravel bikes with this oversized derailleur cage. This upgraded cage fits mechanical12-speed RX820 series drivetrains for Shimano GRX 1X rear derailleurs featuring large pulleys 18-tooth narrow-wide bottom and 14-tooth top and constructed with their strongest cage design yet.

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