I think I've got the backward rim on rear thing figured out. Normally the DRW trucks use a flange between the rim & lug nuts because the rims arn't tapered at the seat. If you use one of these rings on the back side of the the insideout rim on the rear you will once again have a tapered seat. Just use the correct lug nuts. This is still theory untill the spring when I put my junk together.