When to replace your jockey wheels - avoid an expensive mechanical issue and improve your shifting | road.cc
Finding replacement jockey wheel for Shimano and Sram rear derailleurs - YouTube
How & When To Replace Your Derailleur Jockey Wheels - YouTube
10T 7/8 replacement jockey wheel too wide for rear derailleur. Thought I had bought a compatible replacement, but the original shimano deore LX screw isn't long enough to pass through the new