Kogel Ceramic Detailer Pulleys?

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Joshua Haley

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Nov 16, 2023, 8:24:55 AM11/16/23

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Has anyone used ceramic hybrid derailleur pulley wheels made out of Aluminum?Does their longevity and service interval and life meet the manufacturer's claims? I know the Shimano OEM pulleys are good enough, and I really don't care even if it manifested a "free" 1watt advantage. I need a new set, and I like the bling factor, but I don't want to "upgrade" to a set of pulleys that turn to dust after 3000 miles or seize up unexpectedly.

So I'm coming from a position where I don't need to be convinced it's better, but other than cost, are there additional downsides? This would be going in an R8000 Di2 derailleur.

Specifically, I'm looking at these: https://www.kogel.cc/collections/ceramic-derailleur-pulleys/products/12-14t-oversized-derailleur-pulleys-for-shimano-dura-ace-r9100-ultegra-r8000-and-105-r7000?variant=42557635690710