Originally Posted by
acir71
Correct me if I'm wrong, I thought the thread surface width (on the hub) for fg cog & freewheel are different? I do notice that flip flops aren't the same on both side, the fg side has a 2 tiered thread size- the cog thread (inner) is bigger in diameter (same as the freewheel) while the lock nut (outer) one's smaller? I assume the freewheel won't sit in nicely if you install it on the fg side, only abt half of it's thread will contact the hub thread since fg cog is only abt half the width of a freewheel? Or is it ok to have it like that?
Yeah, it's ok. There's still enough threads to properly hold the freewheel.
This is why "fixed" "fixed" hubs are best. Both sides have the double threads allowing a lock ring. One can then run any cog/freewheel combo they choose.