Project X 7c3 Driver Shaft Specs -

Marco called his only remaining contact in the industry: Lena Okonkwo, a composites engineer who had worked for True Temper’s Project X division in 2012.

He packed his bag, drove home, and deleted the file.

At exactly 119 mph of clubhead speed, the shaft would enter a harmonic oscillation. The tip wouldn’t just kick—it would whip sideways . Launch angle would drop by 4°, spin would jump by 1,200 RPM. The ball would start straight, then dive left like a wounded duck. project x 7c3 driver shaft specs

She explained. In 2012, True Temper developed the 7C3 for a single player: a young, volcanic South African who swung 128 mph. He wanted a shaft that felt loose in transition but dead at impact. The engineers created the double-kick profile. But during robot testing, something went wrong.

The project was buried. The 7C3 code was erased from internal records. Marco called his only remaining contact in the

One Tuesday, a client dropped off a relic: a 2013 Tour Issue fitting cart hard drive. “Format it,” the client said. “But save anything weird.”

46.25” raw (Tour issue standard was 46.0”) Butt OD: 0.620” (thicker than any retail) Tip OD: 0.335” (standard) Tip-to-Balance Point: 22.75” (this was the anomaly. In a normal counterbalanced shaft, the balance point is high—near the grip. In the 7C3, it was exactly 1.25” lower than the mathematical model predicted.) The tip wouldn’t just kick—it would whip sideways

They called it “The Scorpion’s Tail.”