Troubleshooting Common Rear Derailleur Shifting Problems on a Bike - Singletracks Mountain Bike News
AASQ #14: How far away from the cassette should I set my derailleur pulley? - Bikerumor
GC42
Top jockey wheel keeps rubbing on 34t cassette ring on my daughters 7 speed. Can't for the life of me figure out how to fix it. More details in comments. : r/bikewrench