Tsunoda Grand Prix Vintage Japanese Steel Frameset – Tange Champion Cr-Mo

Details:

• Brand / Model: Tsunoda Bicycle Grand Prix

• Tubing: Tange Champion Cr-Mo Butted Steel Tubing (No. 2 Profile)

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

• Seat Tube Size (C-T): 55 cm

• Top Tube Length (C-C): 54 cm

• Head Tube Length: 12.2 cm

• Headset Thread / Size: 1" ISO Threaded

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

• Seatpost Diameter: 27.0 mm

• Front Derailleur Mount: Clamp-On

• Hub Spacing: 100 mm / 124–126 mm (Measures ~122 mm, Accommodates 120 mm to 126 mm Hubs)

• Dropouts: Shimano Forged Dropouts

• Color: Deep Metallic Blue with Contrasting Gold Tsunoda Graphics

• Condition: Used, Cleaned, Checked and Fully Functional

• Origin: Made in Japan

Description:

A beautifully crafted late 1970s to early 1980s vintage Japanese road frameset built by the venerable Tsunoda Bicycle company. Constructed from double-butted Tange Champion chromium-molybdenum steel tubing, the frame utilizes the sturdier No. 2 tube profile evidenced by its 27.0 mm seatpost standard—delivering superior torsional rigidity, razor-sharp power transfer, and resilient dampening across rough tarmac. Japanese precision is highlighted throughout with cleanly filed lug work, premium forged Shimano front and rear dropouts with integrated adjusters, a standard clamp-on front derailleur interface, and an easy-to-service 68 mm BSA bottom bracket shell. Finished in a deep metallic blue with crisp gold Tsunoda lettering, this frameset pairs classic racing geometry with enduring Japanese metallurgy, serving as a standout foundation for any authentic 5-speed or 6-speed period build.