Gary, they are not rated. You will be running a tire that is designed for straight line drag racing, with little regard for side loads, as in a spin. Saying that, I have used the frontrunners on a 4500# car at 220 mph, but the more I thought about my investment and personal safety, the cheaper the LSR tires seemed. You probably are safe running 150 with a 3000# car, but you get what you pay for...........Bob