A fundamental change that’s likely to shape up the series is the introduction of the custom AXIS Inertance Control Suspension System. IndyCar’s maligned hybrid system will be nine kilograms (20 lb) lighter in 2028. The new hybrid system will feature a battery-based energy storage system (ESS), which will allow for 14 times the energy storage capacity of the current supercapacitor-based system. The Dallara IR-28 will begin on-track testing this week. “We are pleased to unveil renderings of the new IndyCar chassis that will take our sport into an exciting new era,” said IndyCar President J. Douglas Boles said.