The RADSPEED XD (Extreme Distance) Driver features an oversized shape (460cc) and draw-biased 10 gram RADIAL WEIGHTING to deliver the longest and most forgiving ball flight with low spin. The RADSPEED XB driver features 20g positioned in the back (14g of fixed weight and a 6g interchangeable weight) to create our most forgiving RADSPEED model. An additional 8g of fixed weight is positioned in the front to lower spin for the longest and fastest ball flights.