The Tour Shaft (available in 65 gram or 80 gram) are designed for extra stability, lower launch and lower spin compared to the stock ping shafts. Typically engineered for the player with higher club head speed, high launch annd high spin rates. The new Ping G Driver is Ping's longest, straightest driver, delivering you forgiveness and consistency in your swings. The T9S titanium face is thinner for max deflection and distance. Ping's VorTec technology improves clubhead aerodynamics by minimizing wake turbulence for faster clubhead speed and stability. Drag is reduced by 37% at impact when combined with Turbulator technology. The G driver also employs Dragonfly Technology which contributes to increased distance, forgiveness, and consistency by saving weight from the crown to better position the center of gravity and increase the moment of inertia in every swing. How, you ask? It provides a thinner crown, which saves eight grams of weight, which is reallocated to move the center of gravity position.