I don't know how the ground effects and wings scale, but I'm sure it's dramatically less at 60 than at 200MPH. But I'd also suspect that it is non-zero. It's

I don't know how the ground effects and wings scale, but I'm sure it's dramatically less at 60 than at 200MPH. But I'd also suspect that it is non-zero. It's also possible that this stopping distance was measured with the aerodynamics tuned for 60-0 braking, because they adjust the aerodynamics all the time. >It doesn't matter how much something weighs Stopping distance is absolutely, 100%, impacted by the weight of the car.