I need to replace my rear rim, but I have no idea if it conforms to a standard or what that standard may be called. I was told some time ago by my LBS that they could sell me a rim, but that was all they said and I really don't want to deal with them. I don't know if the mechanism you put the cassette on is called or even if there is more than one standard. I don't know if the centering is the same from one rim to another or if it will need to be re-dished. So can anyone help me learn how to identify what rim I have so I can buy a new one? Any help would be appreciated.