The Track Tour X was designed with the tournament and PBA bowler in mind and the tougher lane conditions they face. This ball utilizes the symmetric DNA core with a higher RG and higher Diff. This core provides predictability and a wide range of drilling options. The Luxury DR-4 Pearl coverstock has a higher grade of resin that results in more vibrant colors and better performance on the backend. The factory finish on this ball provides length on the fronts and lots of motion on the backend. Great for tough patterns that are breaking down. Get smart, get the Tour X!