Hi all,   Tonight, I found something about my rear axel nut. I write here to see if someone have see the same thing on their bike.   I dig for couple of days about the rear wheel sprocket wobble. I see many explanation/reason that could cause that but nothing correspond to mine. I just change the sprocket for a new one, the new one is like an arrow and the original is exactly the SAME. So, this was not the problem. After that, I opened the cush hub to see if everything is in place, no prob