Are you ready for this weekend’s NTT INDYCAR SERIES Sonsio Grand Prix on the road course at Indianapolis Motor Speedway? You will be after Leigh Diffey of NBC gives you the top five facts you need to know! Firestone Tire tracker: livetiming.net/firestone Tune in: Saturday, May 11, at 3 PM ET on NBC and Peacock #firestone #INDYCAR #INDYGP #ThisisMay