{"id":24228,"date":"2026-06-10T21:36:53","date_gmt":"2026-06-10T21:36:53","guid":{"rendered":"https:\/\/mybikething.com\/home\/?post_type=product&#038;p=24228"},"modified":"2026-06-10T21:42:55","modified_gmt":"2026-06-10T21:42:55","slug":"campagnolo-gran-sport-rear-derailleur-1012-1950s-60s-olmo-excellent-cond","status":"publish","type":"product","link":"https:\/\/mybikething.com\/home\/product\/campagnolo-gran-sport-rear-derailleur-1012-1950s-60s-olmo-excellent-cond\/","title":{"rendered":"Campagnolo Gran Sport Rear Derailleur 1012 | 1950s-60s | BBs | Excellent Cond"},"content":{"rendered":"<p class=\"font-claude-response-body break-words whitespace-normal\"><strong>Will this work?<\/strong><\/p>\n<ul class=\"[li_&amp;]:mb-0 [li_&amp;]:mt-1 [li_&amp;]:gap-1 [&amp;:not(:last-child)_ul]:pb-1 [&amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\">\n<li class=\"font-claude-response-body whitespace-normal break-words pl-2\">Campagnolo Gran Sport rear derailleur<\/li>\n<li class=\"font-claude-response-body whitespace-normal break-words pl-2\">Chromed steel, short cage<\/li>\n<li class=\"font-claude-response-body whitespace-normal break-words pl-2\">Ball bearing pulleys, early type<\/li>\n<li class=\"font-claude-response-body whitespace-normal break-words pl-2\">Standard threaded hanger mount<\/li>\n<li class=\"font-claude-response-body whitespace-normal break-words pl-2\">5-speed era, fits Eroica builds<\/li>\n<li class=\"font-claude-response-body whitespace-normal break-words pl-2\">Includes: derailleur only<\/li>\n<\/ul>\n<p class=\"font-claude-response-body break-words whitespace-normal\"><strong>Condition:<\/strong> Excellent condition. Chrome is bright on body and cage. Stampings are crisp. Pivots move freely, ball bearing pulleys spin smoothly. Lots of miles left.<\/p>\n<p class=\"font-claude-response-body break-words whitespace-normal\"><strong>Workshop Wisdom:<\/strong> These early Gran Sport pulleys run on actual ball bearings \u2014 visible right at the pulley face \u2014 a feature that vanished from stock derailleurs decades ago and only returned on premium aftermarket pulleys. Flush, regrease, and they&#8217;ll outlast anything sealed.<\/p>\n<p class=\"font-claude-response-body break-words whitespace-normal\"><strong>Notes from MyBikeThing<\/strong> \u2014 add after the first sentence:<\/p>\n<p class=\"font-claude-response-body break-words whitespace-normal\"><strong>Workshop Wisdom:<\/strong> Gran Sport pulleys run on plain bushings, not bearings \u2014 a drop of oil at each pulley bolt and a wipe of the parallelogram pivots is all the service they ever need. Don&#8217;t overtighten the pulley bolts; they set the spin.<\/p>\n<p class=\"font-claude-response-body break-words whitespace-normal\"><strong>Guarantee:<\/strong> You put in the miles, we put in the work! 30 day Guarantee, rest assured of fit, function and condition \ud83d\ude42<\/p>\n<p class=\"font-claude-response-body break-words whitespace-normal\"><strong>Keywords:<\/strong> Campagnolo Gran Sport, Campagnolo derailleur, 1012, vintage derailleur, rear mech, Campy, eroica, L&#8217;Eroica, vintage road bike, 1950s, 1960s, Olmo, Italian road bike, short cage, Tullio Campagnolo<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Will this work? Campagnolo Gran Sport rear derailleur Chromed steel, short cage Ball bearing pulleys, early type Standard threaded hanger mount 5-speed era, fits Eroica builds Includes: derailleur only Condition: Excellent condition. Chrome is bright on body and cage. Stampings are crisp. Pivots move freely, ball bearing pulleys spin smoothly. Lots of miles left. Workshop [&hellip;]<\/p>\n","protected":false},"featured_media":24230,"template":"","meta":{"nf_dc_page":""},"product_brand":[],"product_cat":[788,175],"product_tag":[6527,6529,6530,6526,6525,223,6090,6531,5270,6510,234,845,4162,271,6532,6528,2763],"product_folder":[],"class_list":["post-24228","product","type-product","status-publish","has-post-thumbnail","product_cat-rd","product_cat-c-road-bicycle-components","product_tag-6527","product_tag-1950s","product_tag-1960s","product_tag-campagnolo-derailleur","product_tag-campagnolo-gran-sport","product_tag-campy","product_tag-eroica","product_tag-italian-road-bike","product_tag-leroica","product_tag-olmo","product_tag-rd","product_tag-rd-campy","product_tag-rear-mech","product_tag-short-cage","product_tag-tullio-campagnolo","product_tag-vintage-derailleur","product_tag-vintage-road-bike","product_shipping_class-bike-components-1-lb","first","instock","taxable","shipping-taxable","purchasable","product-type-simple"],"_links":{"self":[{"href":"https:\/\/mybikething.com\/home\/wp-json\/wp\/v2\/product\/24228","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/mybikething.com\/home\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/mybikething.com\/home\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/mybikething.com\/home\/wp-json\/wp\/v2\/media\/24230"}],"wp:attachment":[{"href":"https:\/\/mybikething.com\/home\/wp-json\/wp\/v2\/media?parent=24228"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/mybikething.com\/home\/wp-json\/wp\/v2\/product_brand?post=24228"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/mybikething.com\/home\/wp-json\/wp\/v2\/product_cat?post=24228"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/mybikething.com\/home\/wp-json\/wp\/v2\/product_tag?post=24228"},{"taxonomy":"product_folder","embeddable":true,"href":"https:\/\/mybikething.com\/home\/wp-json\/wp\/v2\/product_folder?post=24228"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}