{"id":23966,"date":"2026-05-20T21:11:25","date_gmt":"2026-05-20T21:11:25","guid":{"rendered":"https:\/\/mybikething.com\/home\/?post_type=product&#038;p=23966"},"modified":"2026-05-20T22:45:39","modified_gmt":"2026-05-20T22:45:39","slug":"shimano-ultegra-fc-6503-crankset-52-42-30-triple-chainring-172-5mm-octalink-v1","status":"publish","type":"product","link":"https:\/\/mybikething.com\/home\/product\/shimano-ultegra-fc-6503-crankset-52-42-30-triple-chainring-172-5mm-octalink-v1\/","title":{"rendered":"Shimano Ultegra FC-6503 Crankset | 52-42-30 Triple Chainring | 172.5mm | Octalink V1"},"content":{"rendered":"<p><strong>Will this work?<\/strong><\/p>\n<ul>\n<li>Octalink V1 interface \u2014 requires Octalink V1 bottom bracket<\/li>\n<li>Compatible with 8 and 9-speed Shimano road drivetrains<\/li>\n<li>Fits standard 68mm English or Italian threaded BB shell with correct Octalink V1 BB<\/li>\n<li>130mm BCD outer\/middle rings, 74mm BCD inner ring<\/li>\n<li>V1 Triple BB required &#8211; 118mm spindle<\/li>\n<li>BB not included<\/li>\n<li>Includes crank bolts, chainring bolts, and original dust caps<\/li>\n<\/ul>\n<p><strong>Condition:<\/strong> Very good overall. Chainrings show moderate wear with ramps and pins still clearly defined \u2014\u00a0 rings have plenty of miles left. Crank arms logos show cosmetic wear from heel\/shoe rubbing &#8211; Internal splines excellent.<\/p>\n<hr \/>\n<p><strong>Notes from MyBikeThing<\/strong> \u2014 The FC-6503 is the triple version of Shimano&#8217;s legendary 6500 Ultegra generation \u2014 cold-forged aluminum, made in Japan, and built to a standard that modern groupsets rarely match at this price point. The 52-42-30 setup is the classic road triple configuration: the 52 for fast flat miles, the 42 for tempo work, and the 30 for when the road tilts up hard. This is the crankset that kept serious riders climbing comfortably before compact doubles became the default answer. If you&#8217;re building or restoring a late 90s or early 2000s road bike, or just want a bulletproof triple for a touring or endurance build, this is exactly what you&#8217;re looking for.<\/p>\n<p><strong>Guarantee<\/strong> \u2014 You put in the miles, we put in the work. 30-day guarantee on fit, function, and condition. \u2013 Paul<\/p>\n<p><strong>Keywords<\/strong> \u2014 Shimano Ultegra FC-6503, triple crankset, 52-42-30, Octalink V1, 172.5mm, 130 BCD, 74 BCD, 9-speed crankset, 8-speed crankset, 6500 series, silver road crankset, road triple, touring crankset, Japan, cold forged<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Will this work? Octalink V1 interface \u2014 requires Octalink V1 bottom bracket Compatible with 8 and 9-speed Shimano road drivetrains Fits standard 68mm English or Italian threaded BB shell with correct Octalink V1 BB 130mm BCD outer\/middle rings, 74mm BCD inner ring V1 Triple BB required &#8211; 118mm spindle BB not included Includes crank bolts, [&hellip;]<\/p>\n","protected":false},"featured_media":18700,"template":"","meta":{"nf_dc_page":""},"product_brand":[],"product_cat":[175,213],"product_tag":[827,2736,2738,2737,205,2735,831,829,279,70,214,2548,823,216,2569],"product_folder":[930],"class_list":["post-23966","product","type-product","status-publish","has-post-thumbnail","product_cat-c-road-bicycle-components","product_cat-road-bike-cranks","product_tag-172-5mm","product_tag-52-42-32","product_tag-6500-series","product_tag-cold-forged-aluminum","product_tag-crankset","product_tag-fc-6503","product_tag-octa","product_tag-octa-v1","product_tag-road-bike","product_tag-shimano","product_tag-square-taper","product_tag-triple-crankset","product_tag-triple-crank","product_tag-ultegra","product_tag-vintage-cycling","product_shipping_class-bike-components-1lb","first","instock","taxable","shipping-taxable","purchasable","product-type-simple"],"_links":{"self":[{"href":"https:\/\/mybikething.com\/home\/wp-json\/wp\/v2\/product\/23966","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\/18700"}],"wp:attachment":[{"href":"https:\/\/mybikething.com\/home\/wp-json\/wp\/v2\/media?parent=23966"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/mybikething.com\/home\/wp-json\/wp\/v2\/product_brand?post=23966"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/mybikething.com\/home\/wp-json\/wp\/v2\/product_cat?post=23966"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/mybikething.com\/home\/wp-json\/wp\/v2\/product_tag?post=23966"},{"taxonomy":"product_folder","embeddable":true,"href":"https:\/\/mybikething.com\/home\/wp-json\/wp\/v2\/product_folder?post=23966"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}