Firestone tires have unique sidewalls for the Indianapolis 500 which mirror the Firehawk Indy 500 passenger tire sidewall that fans can put on their car.

The Firestone "F-Shield" is white on the left side tires and red on the right side tires so that the teams can easily distinguish between the two. 

Engineer's Note
"The Firestone Indy 500 tires are designed to meet the unique demands of the famed Indianapolis Motor Speedway," said Cara Adams, Chief Engineer of Bridgestone Americas Motorsports. "With a design process lasting over a year, Firestone Engineers and Chemists, using information gained at the September 2016 Indianapolis tire test along with the positive feedback from last year’s race, selected specifications very similar to those used in the 100th Running of the Indianapolis 500. The tires have the same left and right side compounds with some updated rear construction features. We ran this specification in March, April, and May testing at the Speedway. Teams will receive a stager around 0.32 inches - the right rear tire being larger than the left rear tire helps the car rotate into the turns. Teams each receive a base amount of 36 sets of tires for May running, with rookie and refresher drivers receiving an extra few sets."