RD 7800 on my cx bike. Can't find replacements anywhere on the internet. They're hilariously worn. What, just get whole new bike?
Derailleur from 2005 and don't know if it qualifies as "modern". When functioning it works as good as anything out there today. I don't know why they stop supporting their older products.@MMuller buy a set of Tacx pulleys. They come with shims/adaptors to work with everything from Simplex to modern Shimano.