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@chatterbox
After exhaustive reading / watching youtube clips and spending hours trying to adjust the FD I'm about to give up.
The problem is that chain rub occurs when I'm in the middle chainring and either the smallest or largest rear sprocket. It actually starts to rub slightly on the gear just before that. When adjusting cable tension i can get it to stop rubbing on either the smallest or largest sprocket but not both. Is the FD cage too narrow? It's perfectly parallel and I've tried different heights. It shifts perfectly fine. I'll be happy to buy a wider cage if that will sort the issue.
Many thanks