Thanks for the info guys, unfortunately I'm a complete newbie (hence the bike) so I have no idea what a freewheel or a threaded freewheel or a fixed gear cog is. I'm literally that new to this stuff haha.Pat, you mentioned that the hub would run as a freecoaster with enough chain tension, what if I bought tensioners? Or is the better option just to replace the cog? I'm a tad confused, my apologies!