{"product_id":"shimano-dura-ace-1st-gen-crankset-black-rings-complete-tool-set-nos","title":"Shimano Dura-Ace 1st Gen Crankset Black Rings \u0026 Complete Tool Set NOS","description":"\u003ch3\u003eOverview\u003c\/h3\u003e\n\u003cp\u003eIntroduced in 1973 to challenge Europe’s established component monopoly, the first-generation Shimano Dura-Ace (7100 \/ GA-200 series) marked the dawn of modern Japanese high-performance bicycle manufacturing. Engineered from cold-forged duralumin, this landmark crankset established Shimano's global reputation for exceptional metallurgical precision, silky finishes, and surgical power transfer.\u003c\/p\u003e\n\u003cp\u003eThis extraordinary ensemble features the highly sought-after \u003cstrong\u003eDura-Ace Black edition chainrings\u003c\/strong\u003e with factory-machined lightening cutouts, creating an aggressive two-tone contrast against the classic silver arms with black fluted branding. Preserved in museum-grade NOS (New Old Stock) \/ NIB (New in Box) condition, the crankset is showcased in its authentic collector presentation case with red velvet lining.\u003c\/p\u003e\n\u003cp\u003eCrucially for the connoisseur, this ensemble remains \u003cstrong\u003e100% complete\u003c\/strong\u003e: including the matching original Dura-Ace English-thread bottom bracket (BSA 1.37 x 24T, 68 mm spindle), integrated self-extracting One-Key Release caps, and the exceedingly rare, fully equipped original \u003cstrong\u003eDura-Ace Tool Set\u003c\/strong\u003e housed in its dedicated red compartment. An irreplaceable, complete time capsule for a world-class vintage bicycle restoration or museum showcase.\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand \u0026amp; Model:\u003c\/strong\u003e Shimano Dura-Ace 1st Generation (Model GA-200 \/ FC-7100 Series)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEra:\u003c\/strong\u003e circa 1975 – 1978 (Dura-Ace Black Chainring Edition)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCrank Arm Length:\u003c\/strong\u003e 170 mm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBolt Circle Diameter (BCD):\u003c\/strong\u003e 130 mm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eGearing \/ Ratio:\u003c\/strong\u003e 53T outer \/ 42T inner (Black-anodized with factory lightening windows)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCrank Bolts:\u003c\/strong\u003e Authentic Shimano One-Key Release self-extracting chrome caps\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBottom Bracket Standard:\u003c\/strong\u003e English \/ BSA threading (1.37\" x 24 TPI), 68 mm shell width\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTool Set:\u003c\/strong\u003e Complete original Shimano Dura-Ace dedicated factory tool set included in original packaging\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePedal Thread Standard:\u003c\/strong\u003e Standard 9\/16\" x 20 TPI\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCountry of Origin:\u003c\/strong\u003e Made in Japan\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003chr\u003e\n\n\u003ch3\u003eCompatibility \u0026amp; Inclusions\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Fits classic road racing frames with standard 68 mm BSA bottom bracket shells. Compatible with 5-speed, 6-speed, and 7-speed vintage drivetrains and standard 9\/16\" pedals.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePackage Includes:\u003c\/strong\u003e Left and right Dura-Ace 1st Gen crank arms, 53\/42T black chainrings, One-Key Release bolts, complete matching Dura-Ace BSA bottom bracket (cups, lockring, 68 mm spindle), complete original Dura-Ace tool set in red box, and original vintage red collector display presentation case.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003chr\u003e\n\n\u003ch3\u003eCondition\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Condition:\u003c\/strong\u003e NOS \/ NIB (New Old Stock \/ New in Box) – Museum Quality \u0026amp; Fully Complete.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDetails:\u003c\/strong\u003e 100% brand new, never installed, and never ridden. Crank arm tapers and pedal threads are completely untouched. Black anodizing on the chainring teeth is pristine with zero chain contact. The original tools are completely unused and intact in their compartment. The original red presentation box and custom cardboard inserts are preserved in remarkable condition with vibrant color and authentic light storage patina.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003chr\u003e\n\n\u003ch3\u003ePackaging \u0026amp; Worldwide Shipping\u003c\/h3\u003e\n\u003cp\u003eShips fully insured worldwide from Munich via DHL with end-to-end tracking. Every component, tool, and the historic collector box are protected in heavy-duty outer boxing to ensure pristine arrival.\u003c\/p\u003e\n\u003cp\u003eLearn more about our packing standards on our \u003ca href=\"\/pages\/packaging-shipping-standards\" target=\"_blank\" rel=\"noopener noreferrer\"\u003ePackaging \u0026amp; Shipping Standards\u003c\/a\u003e page.\u003c\/p\u003e","brand":"Shimano","offers":[{"title":"Default Title","offer_id":61126024134990,"sku":null,"price":480.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0890\/3186\/8750\/files\/DSC_0038_0155c428-a421-4f8a-ac83-e6a4a5edaf10.jpg?v=1791472829","url":"https:\/\/realsteelbikes.com\/products\/shimano-dura-ace-1st-gen-crankset-black-rings-complete-tool-set-nos","provider":"Real Steel Bikes","version":"1.0","type":"link"}