Overview
- Wind-tunnel experiments reported Wednesday by a University of Tsukuba team measured higher aerodynamic drag on the Trionda at high speeds, and simulations suggest long-range shots could land several meters shorter than with recent World Cup balls.
- The researchers found the Trionda reaches the drag-crisis transition at about 43 km/h, which is well below the roughly 50–65 km/h range recorded for recent predecessors and changes the speed window where flight becomes abrupt or unpredictable.
- All tests used a long-standing protocol that mounts a ball on a rod to measure forces, but the published experiments were performed without ball rotation, a key factor that can alter real in-play behavior.
- Adidas introduced the four-panel Trionda in 2025 with deep surface rills meant to stabilize airflow and cut knuckling, and the company ran an extensive multi-year internal test program whose detailed results have not been publicly released.
- The findings revive historical concerns about World Cup ball design dating back to the 2010 Jabulani and have been shared with FIFA and Adidas, but match-day effects will depend on rotation, weather, and specific venue conditions.