Wheel straps - a loop over the tyre.
I use what is called a "RAC strap" by the recovery trade on the front wheels. This is a loop over the tyre, with hold down hooks front and rear, and a ratchet at the rear. So the front of the car is held in place, and located front and rear.
You can get away with simple ratchet straps on the front, but an "RAC" type is a lot more secure.
The rear on a four wheeler, I use simple ratchet strap set to pull the wheel forwards. A three wheeler is dead light at the back and a simple light strap suffices.
Very important, cars move. Stop and check the retaining straps tightness after about 3 miles. You'll often be surprised at how much looser the trailed car has become. Always check your load security when you stop for fuel etc.
