Ferrari rolled into Austin with its most comprehensive upgrade of the season — floor body, floor boards, sidepod undercut, and diffuser all revised in a package aimed at fixing the SF-25's rear-end grip deficit. Lewis Hamilton tried to tamp down expectations in the paddock, calling it "worth half a tenth," but the scope tells a different story. The changes prioritize rear downforce while also boosting load at the front of the floor, a dual-axis improvement Ferrari desperately needs as it chases McLaren in the constructors' fight. Whether Hamilton's sandbagging or the upgrades genuinely underwhelm won't be clear until race trim in Mexico, but the Scuderia clearly believes this is the piece that unlocks consistent pace at the final three rounds. For a team that's alternated between brilliant and baffling all year, Austin was the line in the sand.
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