| The Tracker is a control disc for big arms, and somewhat overstable for the rest of us. It performs like a champ right outta the box, and now the Tracker joins the ESP family of grippy durability. The Tracker ESP is great for controlled distance. Rip it hard for extra distance with a slow fading finish. Discraft Stability Rating System: (What is this?) 1.8 About Stability The stability of a disc refers to its left or right track during flight. A disc that flies straight when thrown flat and with enough spin has a 0 stability rating. The numbers 1 to 3 indicate an “overstable” disc that will pull or turn to the left, with 1 being less turn and 3 being a hard turn. The number -1 to -3 indicate just the opposite or a disc that turns to the right with -3 being the most turn. All stability ratings are for a right handed backhand throw at average flight speed in zero to light wind conditions. For higher wind conditions choose an overstable disc. About Discraft's ESP Plastic The ESP Plastic is an advanced polymer plastic released in 2006. it is grippier than Elite-Z Plastic and has a higher durability than Elite-X. |