Here it is on big big. I always size new chains using the old chain as a guide which was done using the park tool method. Over the last 2 years I’ve probably done 10,000km on this bike and fitted at least 7 chains and never had this issue before. This issue has only been happening since I fitted the last chain, I suppose there is a chance I removed one too many links (in a rush and not paying attention) but I dunno. The derailleur is super stiff to get to spring back into place. @hippy when I stripped the mech I didn’t remove any pins. I’m out and about at the mo but when I get home tonight I’ll unlink the chain and check it corresponds according to the park tool length calculator.
How old is the derailleur? It used to be a known issue that the return spring in Campag derailleurs would lose tension and need replacing. I’ve stopped using Campag now so don’t know if it’s still an issue.
Here it is on big big. I always size new chains using the old chain as a guide which was done using the park tool method. Over the last 2 years I’ve probably done 10,000km on this bike and fitted at least 7 chains and never had this issue before. This issue has only been happening since I fitted the last chain, I suppose there is a chance I removed one too many links (in a rush and not paying attention) but I dunno. The derailleur is super stiff to get to spring back into place. @hippy when I stripped the mech I didn’t remove any pins. I’m out and about at the mo but when I get home tonight I’ll unlink the chain and check it corresponds according to the park tool length calculator.