Can you have steering tires on rear of a tractor trailer?

The tyre sizes won't match up with the rims you're using for your drives and trailer. Typically, a tractor-trailer will use 11R22.5 tyres for the drives and trailer (some owner-operators choose to get 11R24.5 tyres for their drives, instead). A steer tyre for a normal five axle unit is 315/85R22.5. You could use it legally if you wanted to, but you would have to change all of your rims out, as well.