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.
If the truck is backing up with the front tires turned, the rear of the trailer will swing in the opposite direction of the front tires. For example, if the front tires are turned to the right, the rear of the trailer will swing to the left. This pivoting effect occurs because the trailer follows a different path than the truck's front end. Proper alignment and steering adjustments are crucial to control the trailer's movement while backing up.
for traction
To provide more traction.
If they are regular tires and the tractor is 2wd they are 11.2-24 and 4wd they are 9.5-24 If they are turf tires and the tractor is 2 or 4wd they are 41x14.00-20
The size of the rear tires on the Cub Cadet 1641 garden tractor are 23x10.5-12. The size of the front tires are 16x6.5-8. The wheel base on this tractor is 46.5 inches.
Depends on the engine at what it's cruised at, revolutions per mile of the tires, transmission gear ratios, and rear end gear ratios.
That the trailer tandems are slid all the way to the rear of the trailer.
An 18 wheeler consists of a tractor (meaning something that pulls) and a trailer (meaning something that follows.) A semi tractor-trailer rig has a trailer that sits on top of the frame of the tractor on a coupling device called a "fifth wheel." The tractor has ten wheels with two on the front axle and four on each drive axle in the rear. The trailer has two axles with 4 wheels each. The tractor and trailer together are informally called a rig. Is that what you were after?
No But It can be done and will increase traction
That the trailer tandems are slid all the way to the rear of the trailer.
To get the answer, you need to weigh your tractor trailer empty. When you get that weight, Lets talk numbers, this is wrong but it is a big example. If your tractor trailer is 35,000 pounds empty. Means you can haul about 45,000, as long as you are not overweight on your three axles. Steer, Rear, and trailer axles. 12/34/34.
You call it a semi because it pulls a semi trailer.A semi is a type of trailer. A semi-trailer, as opposed to a full trailer, means it only has axles at the rear of the trailer and a full trailer has axles at the front and rear of the trailer. We call these in the UK "drags", as in wagon and drag, where the wagon that pulls the drag can carry a load on its own, whereas the semi-trailer truck, or tractor unit cannot carry anything without a trailer.