Broken pivot casting.
https://www.ebay.co.uk/itm/296897096205
Arguably the most beautiful derailleur ever made...
https://www.ebay.co.uk/itm/296897096205
Arguably the most beautiful derailleur ever made...
When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.