Chain is rubbing on the top of the Shimano Altus rear derailleur cage across all gear ranges and gets caught at the detachable link at longer ratios. Adjusting the barrel screws doesn't
Amazon.com : Shimano RDM310DL Altus GS 7/8-speed Rear Der Black,Long Cage : Rear Bike Derailleurs : Sports & Outdoors
Shimano Altus RD-M370 SGS Long Cage Rear Derailleur Bike 9 Speed Black Silver | eBay