The IR‑28, IndyCar’s forthcoming race car, endured a brutal test run on Sebring International Raceway’s notorious surface during a two‑day evaluation.
Day One Sets the Tone
Alex Palou, the reigning champion for Chip Ganassi Racing, completed 43 laps on the outer loop of Sebring, pushing the prototype through its paces on a shuffle of asphalt and concrete. The session confirmed that the car’s mechanical foundations were stable, providing a baseline for the days that followed.
Sebring’s Rugged Challenge
Alexander Rossi carried the testing load on Tuesday, clocking 134 laps. The circuit’s uneven, jump‑laden layout offered a harsh proving ground, exercising suspension durability and power‑train resilience in ways that a smooth Indianapolis track cannot match. Rossi’s remarks stressed the value of this hard‑uncover testing: “It mimics street‑course demands, giving a realistic preview of real‑world performance.”
Driver Feedback Highlights Cooling Advances
Rossi noted significant improvements in cockpit cooling, attributing them to body‑integrated ducts introduced in the IR‑28’s design. “Coolingwise, we made a big step in this test,” he asserted. Palou echoed the sentiment, pointing to clearer gains since the Indianapolis sessions. Both drivers agreed that the new thermal package reduced driver fatigue and improved vehicle reliability over extended runs.
Durability Aimed for 2026 Street Circuits
With one‑third of the 2026 IndyCar calendar featuring temporary street circuits, the IR‑28’s performance on Sebring directly informs the chassis’ robustness. Dallara technical teams observed tyre wear patterns and chassis flex, while IndyCar officials confirmed that the car met all baseline safety and handling requirements across the two‑day test.
Looking Ahead to 2028
The IR‑28 remains a year away from its competitive debut, but the data gathered at Sebring provides a roadmap for remaining refinements. Rossi closed the evaluation by saying, “There are more scheduled improvements that will put on a better show for the fans, which is our top priority.” The series can now incorporate lessons from the sessions to deliver a car that excels on road, oval, and street frontiers.
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