Originally Posted by
11.4
The most critical issue is the threading. EAI, Dura Ace and Phil use BSC, while nearly everyone else uses ISO. These are almost identical, but not quite, and you increase the odds of stripping threads by cross threading ISO onto a BSC hub. If you're using an ISO hub then don't worry about an ISO hub, of course.
So I read this and another post on here somewhere about not being able to use one on a hub after you have used the other, say a BSC on and ISO hub so that you can only safely used BSC cogs from then on out. Is this correct? I have formula hubs and have been using a Dura Ace cog but want to switch to a higher tooth count and EAI has the one I want. The DA is BSC and the EAI is ISO and I am assuming the formula hub is also ISO. So any thoughts on this?