And you thought a ball was just a ball? From the iconic 32 panel black and white Telstar introduced in Mexico City in 1970 to the latest unveiled today for South Africa, the goal for Adidas, naturally, has always been to build a better ball. Soccer players want a ball that feels good on the foot and flies predictably no matter where on the ball it’s struck. Teamgeist achieved its improvements by reducing the number of panels from 32 to just 12, by thermally bonding the panels thereby eliminating inaccurate stitching and by forming the outer panels in 3-D versus making them flat and bending them into shape.
While Adidas would not provide numerical flight data, it claims that robotic kicking and wind tunnel testing at Loughborough University in England and at its own football lab in Germany show that Jabulani is its most accurate ball. To be sanctioned FIFA Approved, a ball is only subject to a handful of more static tests, which the Jabulani ball obviously meets.
• Circumference: FIFA Standard: 68.5-69.5cm, Jabulani: 69.0 +/- 0.2
• Roundness: Diameter is measured in 16 different locations. FIFA Standard: max 1.5% difference, Jabulani: max 1.0% difference
• Water Absorption: A ball is pressed and rotated in water 250 times: FIFA Standard: max 10% weight increase. Jabulani: 0% weight increase
• Weight: FIFA standard: 420-445 grams, Jabulani: 440 +/- 0.2 grams
• Uniform Rebound: The only dynamic FIFA test, the ball is dropped ten times onto a steel plate from a two meter height. The difference from the lowest to the highest bounce can be no more than 10 cm. Jabulani bounced in a range from 143 to 149 cm.
• Loss of Pressure: Air pressure measured three days after inflation. FIFA Standard: 20% max loss, Jabulani: 10% max loss
For a unique look into complex manufacturing steps to create the ball, see the video below.