I own a set of these http://www.performancebike.com/bikes...1511000_400219
and the speed discs that came on this http://www.bikesdirect.com/products/...tom_comp08.htm
and I have no clue which are better. Im talking not just the rim but spokes, hubs and freehubs. Weight doesnt really bother me. They appear to be equal level. The rims on the speed disc are better but The hubs are not I dont think. The terramax freehub is metal. The speed disc is plastic. But I dont really know.