TSi1 DRIVER ULTRA-LIGHTWEIGHT DISTANCE. For players with moderate swing speeds seeking an ultra-lightweight configuration to help maximize distance. The TSi1 Driver features super-lightweight components and a deep, face-centered CG for increased launch and exceptional ball speed. Ultra-Lightweight Design From clubhead to grip, TSi1 metals have been strategically engineered and weighted to deliver maximum launch and distance at moderate swing speeds. Multi-Dimensional Stability Players often equate “high MOI” with heel to toe forgiveness, but we employ a more holistic approach to MOI design. Our inertia also delivers more speed and a tighter spin range up and down the face, freeing you to attack every drive. Performance-Tuned Adjustability The adjustability features of TSi have been engineered to deliver maximum benefit for every player. We continue to refine the ways in which a fitter can fine tune performance to ensure you get the most out of every swing. Aldila Ascent Featured Shaft ASCENT™ Ultralight shafts deliver an easy, high launch angle without the typical compromises of an ultra-lightweight shaft. Featuring Focused Mass Technology (FMT™), a precise weighting section that utilizes heavier, tungsten-infused prepreg in the butt end to help players turn through the ball better for stronger, straighter/drawn ball flight.