"I agree. Came across a few doing 60-63 in a 70. If you have to drive that slow then you are not ready to be towing or your setup is so poor that is the only option! "
Driving 65 is the max with some RV tires. That's it plain and simple. We don't drive over 65 on the interstate where the limit is 70. On mountain highways, we drive slower and pull aside in marked lanes for others to pass. No one is going to push us beyond what we feel is safe. So many times we are passed by people towing their rigs going way to fast for the mountain conditions only to find them pulled over up the road nursing an overheated TV. IMHO, many, many, drive way too fast, even on the city boulevards. I've seen it because we live off of a busy side street and I see drivers towing going through the intersection way too fast.