The Spanish Grand Prix is often a turning point in the championship due to its technical relevance, especially this year. In Barcelona, the much-anticipated new deformation tests for front wings come into force, with consequences that are hard to predict. However, it’s important not to focus solely on the regulatory change in a race that will reveal much about the outlook for the long summer season. McLaren could dominate, but the missed win in 2024 underlines the importance of not missing the opportunity to secure pole.
Rules are changing
The main topic of the weekend is the debut of the new flexibility tests for the front wing, announced at the end of January and significant enough to prompt teams to redesign their wing elements. The loads applied during technical inspections remain the same, but the allowable deformations are reduced, while still permitting a certain degree of flexibility. The collective question is what the impact on the pecking order will be and whether the “performance reset” envisioned by Fred Vasseur could actually materialize. As previously highlighted, the changes affect not just straight-line efficiency but especially the evolution of aerodynamic balance in transitions from slow to fast corners. Making predictions is difficult, as the outcomes will depend on driver adaptation, the characteristics of each design, and how teams respond in reshaping their wings.
There is little doubt, however, that Barcelona is the best track to assess the impact of the new flexibility rules. Often considered the best testing ground of the year, the Catalan circuit is no longer the most representative in a calendar that has become extremely varied, but it still reflects the kind of European tracks that will populate the summer. Montmeló is a balanced mix of medium- and high-speed corners that require plenty of aerodynamic load, with a couple of bends close to 100 km/h, making it an excellent test of car balance. It’s no coincidence that teams often choose Spain to introduce update packages, and there is reason to believe that will happen again this time.
Through Montmeló’s long corners
Barcelona is rich in long-radius corners, especially turns 3, 4, and most notably turn 12, the famous Banc Sabadell. These are corners where the steering input is sustained for a long time, with the car leaning on the outer side. What stands out is the car’s mechanical and aerodynamic stability — crucial traits heading into a European season where long corners will be frequent. The mid-corner phase is the one that most closely resembles the ideal condition in which the car has completed its transitional movements and travels at constant speed, roll, steering angle, and wheel camber. It’s a period during which the driver must be able to rely on a strong aerodynamic platform, with consistent load and balance — key for staying on the grip limit without battling an unsettled car.
Mid-corner stability has long been a weak point for McLaren, which for years was competitive in high-speed corners only as long as they were short and didn’t require prolonged steering. However, with the upgrades introduced earlier in 2024 and with the MCL39, the Woking team has addressed that gap. Leading both championships, McLaren heads to Barcelona as the favorite, with a car that already proved in Miami to offer many setup options for balancing high- and low-speed sections. The reigning champions are expecting a more competitive weekend than the last. The papaya-colored cars are still the reference point in terms of versatility and low-speed agility, but in Suzuka, Jeddah, and Imola they have already shown themselves to be catchable on faster tracks.
Opportunities for the chasers
The situation is different for Red Bull, which will be more at ease through Barcelona’s long corners than in Monaco’s hairpins, though stability remains high on its development agenda. “Mid-corner balance is what we need to improve,” Max Verstappen warned back in Japan, which is why Spain will be the best opportunity to assess progress. Mercedes also warrants attention — a car that had proven solid, consistent, and with a stable rear end up until Miami. But Imola and Monaco cast doubt on those certainties, with the team even temporarily shelving its Italian upgrades in Monte Carlo. In recent years, however, the Brackley squad has often performed well in Barcelona, now helped by a car less sensitive to high temperatures.
Finally, there’s Ferrari, which has worked extensively over the past year on improving stability through corners, aiming to overcome a chronic weakness of its cars. Frederic Vasseur is confident the new flexible wing tests could give the Prancing Horse renewed momentum, but aside from the directive, the SF-25 is unlikely to replicate the form seen in Monte Carlo. Barcelona features long high-speed stretches that will force the team to stiffen the suspension to prevent excessive floor wear, compromising the setup. Still, Ferrari will try to capitalize on its strong aerodynamic load in fast corners, and particularly on the smooth asphalt surface, which could mitigate issues with ride height management.
High-degradation race
In Spain, the hardest compounds in the range return — C1, C2, and C3 — last used in Bahrain. It’s a mandatory choice by Pirelli to deal with a track that, thanks to its long loaded corners, high speeds, and high-downforce configurations, generates lots of energy in the tyres. Coupled with the scorching Catalan heat, Barcelona traditionally sees high thermal degradation, likely leading to two-stop strategies.
McLaren has the chance to assert its race pace advantage through excellent tyre management, but qualifying must not be underestimated. Already in 2024, the Woking squad fought for the win, but Lando Norris was never able to reclaim the lead from Max Verstappen after conceding position on the run to turn 1. A possible win for the papaya duo would diminish the comeback hopes of their rivals, who are clinging to a technical directive that could reopen the championship — or just as easily shut it down completely.
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