The F1 2025 summer break provides us with an opportunity to look back at the development battle that’s been raging on in the first half of the season.

Using the car presentation documents issued at each race we’re able to track what’s changed on a race-to-race basis, albeit with the caveat that what’s listed at a race might not actually be raced and saved for a later race instead.

How the F1 2025 development race has evolved

One of the interesting asides to note whilst looking through the following charts is how development was affected this season by the introduction of more stringent load and deflection tests at the Spanish Grand Prix (Round 9).

Where teams used their resources ahead of and after that change provides some context on the implications posed, most of which revolves arou

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