Firestone Firehawk Indy 500 Ultra-High Summer Peformance. Buy Stance SF-01 Silver with Brushed Spoke Faces 20×10.5 +30mm paired with Firestone Firehawk Indy 500 255 35R20. The Firestone Firehawk Indy 500 uses a new, high-performance, silica-enhanced Long Link Carbon tread rubber compound molded into an aggressive-looking. 285/30R20 XL Firehawk Indy 500 Ultra-High Performance Summer Passenger Car Radial tire. Benefits Improves water evacuation and increases resistance.