Overview

Introduced 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.

This extraordinary ensemble features the highly sought-after Dura-Ace Black edition chainrings 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.

Crucially for the connoisseur, this ensemble remains 100% complete: 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 Dura-Ace Tool Set housed in its dedicated red compartment. An irreplaceable, complete time capsule for a world-class vintage bicycle restoration or museum showcase.

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Specifications

• Brand & Model: Shimano Dura-Ace 1st Generation (Model GA-200 / FC-7100 Series)
• Era: circa 1975 – 1978 (Dura-Ace Black Chainring Edition)
• Crank Arm Length: 170 mm
• Bolt Circle Diameter (BCD): 130 mm
• Gearing / Ratio: 53T outer / 42T inner (Black-anodized with factory lightening windows)
• Crank Bolts: Authentic Shimano One-Key Release self-extracting chrome caps
• Bottom Bracket Standard: English / BSA threading (1.37" x 24 TPI), 68 mm shell width
• Tool Set: Complete original Shimano Dura-Ace dedicated factory tool set included in original packaging
• Pedal Thread Standard: Standard 9/16" x 20 TPI
• Country of Origin: Made in Japan

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Compatibility & Inclusions

• Compatibility: 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.
• Package Includes: 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.

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Condition

• Overall Condition: NOS / NIB (New Old Stock / New in Box) – Museum Quality & Fully Complete.
• Details: 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.

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Packaging & Worldwide Shipping

Ships 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.

Learn more about our packing standards on our Packaging & Shipping Standards page.