Hi..I ordered a freewheel thinking that's what it was...However it turns out not to be a freewheel. I am new so forgive any ignorance I may have. But the freewheel just threads on. What I have only the last cog threads on and the other five cogs are one unit that just slides on over the hub. I probably should have taken a picture. I was hoping it was a freewheel since they seem to be easy to still find.