As fine as it sounds, I tried the self-centering on my steel wheels. After a couple of months, I had to pull one of the front tires. The cones had actually "eaten" into the seat area and gouged out a small cone area. If you have the flanged nuts, you should probably stick with them. I found some at O'Reilly's here, but had to order them.

Richard S.
88 Toy 4x4 Truck, 22RE, 3"BL, 5-Speed, Muds
Proud to be an American. Blessed to be a Texan!