P1racenews AI automatic summary:
Among a few changes coming for the 2026 NTT IndyCar Series season, a new rule will be in place regarding the use of Firestone’s alternate tires. Alternate tires are made of a softer compound of rubber than primary tires, and give drivers and teams additional strategy options for the race weekend. The softer compound is […]
For the 2026 NTT IndyCar Series season, a new rule will require drivers to use two sets of Firestone’s alternate tires during every street course race.
These alternate tires have a softer compound than primary tires, providing more strategic options for teams on road and street courses with a red or green stripe on the sidewall.
Previously, drivers had to use at least one set of new alternate tires per race, but the requirement now mandates two sets for street course races with no specification on their condition.
The change aims to enhance on-track action and challenge drivers and strategists on the street circuits for more exciting races in 2026.
IndyCar’s Senior Vice President, Mark Sibla, believes this update will add to the intensity and memorable moments for fans during the races.
Each tire set must complete two laps on the car, one being under green, to meet the rule, encouraging varying pit strategies and more wheel-to-wheel action.
The new rule will debut at St. Petersburg this weekend and continue through the six planned street course events on the season’s calendar, maintaining one set of alternates for permanent road courses.
