{"id":24251,"date":"2026-06-10T22:15:14","date_gmt":"2026-06-10T22:15:14","guid":{"rendered":"https:\/\/mybikething.com\/home\/?post_type=product&#038;p=24251"},"modified":"2026-06-11T22:44:37","modified_gmt":"2026-06-11T22:44:37","slug":"olmo-magistroni-cottered-crankset-51-48-italian-bb-complete-1950s-60s-vgc","status":"publish","type":"product","link":"https:\/\/mybikething.com\/home\/product\/olmo-magistroni-cottered-crankset-51-48-italian-bb-complete-1950s-60s-vgc\/","title":{"rendered":"Olmo Magistroni Cottered Crankset 51\/48 + Italian BB Complete | 1950s-60s VGC"},"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\">Olmo-stamped Magistroni cottered crankset<\/li>\n<li class=\"font-claude-response-body whitespace-normal break-words pl-2\">51\/48T close-ratio racing rings<\/li>\n<li class=\"font-claude-response-body whitespace-normal break-words pl-2\">170mm arms, chromed steel<\/li>\n<li class=\"font-claude-response-body whitespace-normal break-words pl-2\">Complete Italian thread BB, 36&#215;24, 70mm shell<\/li>\n<li class=\"font-claude-response-body whitespace-normal break-words pl-2\">132mm spindle e-e, cotter pins included<\/li>\n<li class=\"font-claude-response-body whitespace-normal break-words pl-2\">Includes: arms, rings, BB cups, spindle, lockring, bearings, hardware<\/li>\n<\/ul>\n<p class=\"font-claude-response-body break-words whitespace-normal\"><strong>Condition:<\/strong> Very good condition. Chrome is glossy and bright with patina toward the pedal ends of the arms. Teeth are in fine shape. Some patina on the spindle. BB threads are in great shape. Bearings cleaned, all balls accounted for, will need regreasing before install. Lots of miles left.<\/p>\n<hr \/>\n<p class=\"font-claude-response-body break-words whitespace-normal\"><strong>Notes from MyBikeThing:<\/strong> The real deal \u2014 Olmo&#8217;s own stamped crankset off a 1950s-60s Olmo that came apart without a fight after sixty-plus years. The 51\/48 close-ratio rings are pure period racing spec, the kind of gearing nobody has made in decades and Eroica builders hunt for. Sold complete with its matching Italian-thread bottom bracket \u2014 the pairing this crank was built around.<\/p>\n<p class=\"font-claude-response-body break-words whitespace-normal\"><strong>Workshop Wisdom:<\/strong> Italian bottom brackets thread right-hand on both sides \u2014 the fixed cup can loosen under load, so install it tight with a thread compound. And press cotter pins in, don&#8217;t hammer them; a bench vise with a socket seats them clean and saves the threads.<\/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> Olmo crankset, pantograph crankset, cottered crankset, 51 48 chainrings, close ratio, Italian bottom bracket, 36&#215;24, 70mm shell, Magistroni, vintage crankset, eroica, L&#8217;Eroica, 1950s, 1960s, Italian road bike, steel cranks<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Will this work? Olmo-stamped Magistroni cottered crankset 51\/48T close-ratio racing rings 170mm arms, chromed steel Complete Italian thread BB, 36&#215;24, 70mm shell 132mm spindle e-e, cotter pins included Includes: arms, rings, BB cups, spindle, lockring, bearings, hardware Condition: Very good condition. Chrome is glossy and bright with patina toward the pedal ends of the arms. 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