IndyCar IR‑28 makes its real‑world debut
After initial smoothness runs at Indianapolis in August and September, the brand‑new IR‑28 chassis was placed on Sebring’s notoriously rough bumps for its first true durability assessment.
Champion Alex Palou drove the Honda‑powered Chip Ganassi Racing car, completing an uninterrupted 43‑lap pass and confirming the chassis’ stability under hard‑contact conditions.
Findings for the series’ upcoming season
The data gathered during Palou’s record shows the IR‑28 squared‑up for the demands of the 2026 racing calendar, with teams already planning to race on the chassis’s newly validated set‑up.
What follows the Sebring trial
Engineers will now focus on fine‑tuning suspension geometry and material layering based on the insights from the bumps, setting the course for the IR‑28’s future on oval and road circuits alike.
Palou pushes IndyCar IR‑28 chassis to limits in rugged Sebring test
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