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Kogel's new Rotor Lock Rings are the perfect choice
you just need to find out if your crank set uses the long or short bolt
Kogel Speed Kolossos for Shimano GRX 2x (11 & 12-Speed
XT MR-M8100
For GRX 1x set ups
Oversized Derailleur Pulleys for Shimano Dura Ace R9200 - Full Ceramic - 12/14T Color:Gold Kogel's new Rotor Lock RingsThese oversized pulleys fit the newest version of Dura Ace R9200, Shimano's flagship 12 speed drivetrain. Plus, these are full ceramic meaning ceramic bearings AND races that give you the highest level of efficiency so you can go even faster with less energy. 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
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