Aaand the issue was the b screw! Tightening it up a bit moved the jockey wheel away from the bigger cogs and the issue has gone away.
Thanks, all!
@hazzelfrazzel started
London Fixed Gear and Single-Speed is a community of predominantly fixed gear and single-speed cyclists in and around London, UK.
This site is supported almost exclusively by donations. Please consider donating a small amount regularly.
Aaand the issue was the b screw! Tightening it up a bit moved the jockey wheel away from the bigger cogs and the issue has gone away.
Thanks, all!