Well there is nothing wrong with the Helico design if anything it is a mechanicaly better design than the old freewheels and is arguably as good or better than the modenr cassettete design. I was just it came out in the dwilight years for French components and cost slightly more to make which lead to its premeture demise. Some say that the slightly outward bearings on the drive side where a issue but not a problem with quiality bearings and good maintence. I road one for about ten years on a daily rider fairly hard with no problems and sold the bike and it is still going strong I see the buyer still riding it around.