Dave where did you get your figure that a rotary forged wheel is 80% as strong as a forged wheel? Are you shooting from the hip? I really doubt that it would be as much as 80% but I may be wrong. If you think about the forging process there are ENORMOUS pressures involved in pressing the raw drum into a wheel blank (YouTube it) and there is just the minimum amount of material left but extremely dense. The grain structure of the metal is aligned against road forces, which is what rotary "forged" copies with their spinning process but without the huge pressure which creates a lot of strength. I think the RSII is a strong wheel because it is an efficient structural design with so many spokes and it copies wide flange beams for it's spoke sections which are also an extremely efficient structural shape, not because rotary forging yields comparable results to real forging. To do a proper comparison you would have to use the same exact wheel design with each method. I bet HRE has an idea because they released recently their flow formed line which have extremely similar designs to their original forged line. But we will probably never really know as it's the sellers that claim "comparable strength" but I haven't seen any hard data.
