Koga Miyata GentsRacer-S Vintage Japanese Steel Frameset – Tange Champion Cr-Mo

Details:

• Brand / Model: Koga Miyata GentsRacer-S

• Tubing: Tange Champion Double-Butted Cr-Mo Steel Tubing

• Fork: Miyata Matching Cr-Mo Steel Fork (1" Threaded)

• Seat Tube Size (C-T): 56 cm

• Top Tube Length (C-C): 55.5 cm

• Head Tube Length: 14 cm

• Headset Thread / Size: 1" ISO Threaded

• Bottom Bracket Standard: British Threaded (BSA / 68 mm Shell Width)

• Seatpost Diameter: 26.8 mm

• Front Derailleur Mount: Clamp-On

• Hub Spacing: 100 mm / 126 mm

• Dropouts: Shimano SF Forged Dropouts

• Color: Metallic Champagne Green

• Condition: Used, Cleaned, Checked and Fully Functional

• Origin: Handbuilt in Japan by Miyata for Koga

Description:

A premier example of Japanese metallurgical precision merged with European racing pedigree, the GentsRacer-S stands as one of the most celebrated competition framesets from the golden era of the Koga Miyata collaboration. Meticulously hand-brazed in Japan by Miyata's master craftsmen using double-butted Tange Champion chromium-molybdenum seamless steel tubing, the frame utilizes the reinforced 26.8 mm seat-tube wall configuration engineered to deliver exceptional lateral stiffness under power while preserving the sublime road-smoothing ride quality classic Japanese steel is renowned for. The frame is outfitted with forged Shimano SF vertical-entry rear dropouts complete with integrated tension adjuster screws, matching Miyata Cr-Mo fork blades with elegant crown detailing, a dependable 68 mm BSA bottom bracket shell, and traditional clamp-on derailleur compatibility. Finished in Koga’s distinguished metallic champagne green finish with contrasting period decals, this 56 cm frameset offers the quintessential base for an authentic, period-correct 6-speed Shimano 600 or Dura-Ace build.