How Turn 19 Track Limits Reshaped the Opening Benchmark at COTA

A Decisive Margin at Turn 19

Circuit of the Americas consistently tests corner-exit discipline, particularly through the sweeping penultimate turn where running wide carries an immediate penalty. During opening practice for the 2026 United States Grand Prix on 23 October, that exact boundary determined the timing screen hierarchy. Max Verstappen produced an effort capable of taking the top spot, but a track-limits infringement at Turn 19 invalidated the time, leaving his retained best at 1:36.136.

That deletion preserved the lead for Ferrari, with the initial headline of the United States GP: Leclerc pacing the session on a 1:36.052 benchmark. Because the deleted lap was scrubbed for exceeding track boundaries rather than mechanical limitation, the final classification reflected adherence to track limits at Turn 19 rather than demonstrating an absolute pace advantage across all flying laps.

Tyre Programmes and Changing Circuit Grip

Evaluating single-lap times during Friday running at Austin requires accounting for divergent run plans and track evolution. Ferrari and McLaren carried out their opening runs on medium tyres, whereas Red Bull and Mercedes started the session on hard compounds before all frontrunners transitioned to soft tyres. Ferrari also spent the session assessing updated aerodynamic components, including revisions across the floor, sidepods, and diffuser.

Grip levels away from the racing line proved treacherous, as seen when Lewis Hamilton ran wide onto dusty run-off during his initial soft-tyre attempt. Combined with varied tyre compounds across the first half of the hour and high-fuel race simulations in the closing minutes, the retained gap of 0.084 seconds between Leclerc and Verstappen remained heavily framed by Austin's unforgiving white lines.

Official reference: Formula1.com’s account.