[OldJedi]

They are a royal pain in the ass to put on. The object of the rings is divert air flow through the center of the rotors. Air is supposed to come through the brake duct hit the rings then make a 90 degree turn and go through the center vanes and cool the rotor, in theory. I have no clue whether they actually work or not. If you track once or twice a year you might want to do this. If you track more often you might want to consider two piece brake rotors.

Follow the directions, and take off the front wheels. Cut 3 - 6" pieces of stainless wire and bend them in a "U". Bring the "U" from the back side of the rotor. Put one leg of the "U" on either side of the rotor supports and then through the two close holes in the ring. Twist the wire with your fingers to keep the ring in place. Do this twice more for the other two sets of holes in the ring. Once all three are finger tight, use pliers to continue making haywire twists on all three "U"s, while pressing the ring tight against the rotor. Twist the wires until the ring is held tight against the rotor. Once all three are tight, cut off the excess and flatten the wire twist against the ring to keep them from hitting the wheel. Put the wheel on and spin it to make sure that it does not hit the wire ends. Torque the wheels to specs (100 Ft. Lbs.)

When you are done, take off the wheels and cut off the wire holding the rings. Take off the rings and put the wheels back on.