Overview
- Pirelli ran its first contracted‑rider test for 850cc prototypes at Brno on Monday, with all five manufacturers providing two bikes to evaluate tyre behaviour under race and sprint simulations.
- The supplier brought a large compound catalogue and around 400 tyres to gather data on grip, degradation and durability during full race‑distance runs.
- Unofficial timing from the private session suggested Aprilia posted the quickest laps, though no official times were released because the test was closed and untimed.
- Marc Márquez had a minor crash during the day with no injury reported and said he believes the tyre change will matter more than the 850cc engine and aero rule changes.
- Manufacturers took different rider‑selection approaches to balance development with information control and Pirelli plans two more contracted‑rider sessions at the Red Bull Ring in September and at Valencia at season end.