What is the top speed of a tractor trailer (16 wheeler)?

Question

A Tractor Trailer, with an empty trailer behind it (except for a black dog in the back), on a 10 mile long straight road with no cars around. What would the top speed be?

Answer 1

Depends on the engine and tranny set up but 130mph is the most i've heard of

Answer 2

bout 120 with a big motor in it otherwise about 90

Answer 3

I though tractor trailers had 18 wheels, except for the rock hauler that my hubby use to drive (20 wheels).  But the other poster is probably right about the speed. I wouldn't want to be in one going that fast. But the top speed of some are about 65 cause the company sets them so they won't go over that.