Mercedes completed 125 laps and 551 kilometres at Magny-Cours as part of Pirelli’s latest development test for its 2027 Formula 1 intermediate tyres. Third driver Frederik Vesti evaluated a range of prototype solutions featuring different compounds and constructions, with particular focus on warm-up performance.
Real rain also played a useful role in Pirelli’s programme, helping the Italian tyre supplier gather data for next season’s wet-weather products. Further work is planned for the following day, when the programme is expected to switch to slick tyres and focus more closely on the crossover window between wet and dry compounds.
Mercedes and Frederik Vesti test 2027 intermediate tyres
Frederik Vesti, Mercedes’ third driver, spent the day evaluating several different intermediate tyre solutions at Magny-Cours. The prototypes varied in both compound and construction as Pirelli worked to identify the options capable of delivering the strongest warm-up performance.
Warm-up remains one of the key areas of tyre development because drivers need the compound to reach its effective operating range quickly, particularly in mixed or low-grip conditions.
Natural rain helps Pirelli wet-weather programme
The circuit remained wet during the morning thanks to rainfall overnight, providing Pirelli with natural conditions for its test programme.
During the afternoon, the level of water on the asphalt was maintained through Magny-Cours’ artificial irrigation system, allowing the testing conditions to remain sufficiently consistent for continued evaluation of the prototypes.
Frederik Vesti completes 551 km at Magny-Cours
Frederik Vesti completed a total of 125 laps over the course of the day, equivalent to 551 kilometres of running.
The Mercedes driver recorded a best lap of 1:30.284. Track temperature reached a maximum of 22°C, while the air temperature peaked at 20°C.
The mileage gave Pirelli a substantial amount of data from several intermediate tyre specifications, with the different compound and construction combinations compared under wet conditions.
Pirelli to focus on slick tyres and crossover window
The test programme is scheduled to continue with an evaluation of dry-weather compounds. One of the key objectives will be to define the crossover window more precisely, helping establish the point at which slick tyres become preferable to wet-weather compounds as track conditions improve.
If rainfall continues overnight or during the following day, however, the programme could switch back towards further wet-tyre development instead.
The Magny-Cours running forms part of Pirelli’s wider preparation for the 2027 Formula 1 season, with the tyre supplier continuing to refine both construction and compound characteristics ahead of the next regulatory cycle.
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