Palou pushes IndyCar’s IR-28 chassis to the limit in rugged Sebring test

Following initial smoothness tests on the oval and road course at Indianapolis Motor Speedway in August and September, IndyCar’s new IR-28 chassis officially faced its first true durability test on the grueling bumps of Sebring International Raceway. On Monday, five-time and reigning IndyCar Series champion Alex Palou took the wheel for Honda-powered Chip Ganassi Racing, completing 43 laps around Sebring's outer loop. The testing duties at the historic Florida venue transition on Tuesday to 2016 Indianapolis 500 winner Alexander Rossi, driving for Chevrolet-powered ECR. Sebring’s harsh mix of concrete and asphalt makes it an ideal testing venue.