Tension (lbs) 100 90 80 70 60 50 40 Peak Tension of Multiple Strings Spin Potential l-- | -+ Stiffness (lb/in) 0.20 0.15 0.10 0.05 0.00 350 300 250 200 150 100 50 String to String Friction Stiffness of the String 0.50 0.55 0.50 0.45 0.40 0.35 0.30 0.25 String to Ball Friction Original Tension Speed Swing 2000 2500 2000 1500 1500 1000 1000 500 500 III 0 0 High Low Medium Fast Medium Slow