How fast do you go

My trailer tires are rated for 65 mph sustained speed so I do not tow faster unless overtaking a slow vehicle. If the speed limit is posted higher, I still do not tow any faster. Many places where I tow have restricted speed for vehicles towing (sometimes down to 55 mph) to which I will adhere. I find towing around 60 mph gives me a respectable speed and fuel economy while towing faster puts additional wind drag into play hurting mileage with little time benefit.