Let me know when you find that 200mph trailer. I definitely want to try that out!

I'm still trying to figure out tires and rolling resistance. I've found that the coefficient of rolling resistance for normal tires on concrete is about 0.010-0.015. But I can't find specific numbers on specific tires. I also don't know if this coefficient will work in the equations above or not. Probably not, but it would stand to reason that instead of frontal area of the vehicle that you would use the contact surface area of all four tires. But that's just conjecture. If anyone knows the real deal, let me know.