Hi, I figured you all here in the mechanics forum could help me out. I have an old Zeus hub, that currently has 6 speed Shimano freewheel on it that needs to be replaced. So I need to know if a Regina America 6 speed freewheel with ISO threading would work. I'm new to geared bikes and the different types of threading that comes with this territory. If this is like asking if milk goes with cookies, I apologize. But I'm just making sure! Thanks a bunch.