I don't recommend the drift rings, but if you're hell bent on them all you need is 4 yokomo drift tires, they come with the rings, and several spare sets of rings to have with you. Putting the rings on the tires is as easy as that, you slip the ring onto the tire untill it matches up with the groove in the tire.

Yokomo drift tire product link: [link=http://www2.towerhobbies.com/cgi-bin/wti0001p?&I=LXGMV9&P=ML]http://www2.towerhobbies.com/cgi-bin/wti0001p?&I=LXGMV9&P=ML[/link] You would need to order 2 pairs of these.
Yokomo drift rings product link: [link=http://www2.towerhobbies.com/cgi-bin/wti0001p?&I=LXGMW0&P=ML]http://www2.towerhobbies.com/cgi-bin/wti0001p?&I=LXGMW0&P=ML[/link] Have plenty of these on hand.

As you can see, the price for these products is rather expensive and what fun you get out of them is short lived. That's why most people prefer other drift tire solutions.

Drift Specialties drift tire product link: [link=http://www.driftspecialties.com]http://www.driftspecialties.com[/link]

Comparing the price and quantity shows that the later is a far better deal.

Either solution uses any 26mm or 24mm wheels for 10th scale touring cars.