Here you go, my best candidate for a genius award lately. Ignore the fact that they are mitigating any possible gas mileage gain by driving 80 mph down the highway. I am guessing there, but they flew past me and I was driving a little over 70. Then consider the fact that the hitch that you can buy for a Prius is specifically designed to be a mount for a bike rack. Period. They are not rated for ANY tongue weight or towing capacity. Awesome. Stay safe folks.