Uh, however fast the driver wants to go.
Depends on how they're geared.
As fast as the specifications allow it to go.
I hope you mean horse trailer, not truck. If your horses have never been in a trailer before get them used to it buy putting food in the trailer so if they want it they have to go in
loaded coal trains go 55mph and are 18 thousand tons 120 cars
As fast as the truck will go... 4 LOW is the limited one < 30mph.
It gose 180
about 50
Hitch the trailer. Connect the lights. Start your car or truck. Turn the turn signal on. Get out and go behind the trailer. See if they blink. Repeat for the other side.
To many variables to answer that one.
100 miles per hour
Our International is "capped" at 72 mph.
Remove some of the hay from the truck