ON my Puegeot, I'm running an old mallard freewheel hub, that has been spaced and the wheel has been redished. Just screwed on a BMX freewheel, running 48/17. While flip flop hubs are nice and all, but I have been able to salvage the old freewheel hubs on most of the SS conversions I have done. Usually reverse dishing the wheel and moving the spacers to the other side of the axle after sliding it over works.