This off center issue on my 2 week old Reba led me to this forum, and others, seeking answers. Mine was off center to the disc side about 5 mm and still spun true. Needless to say, I was a little upset. I have been riding Rock Shox forks for almost 4 years with never an issue except now.
Just as I was getting ready to call my LBS, I took the wheel out and carefully reinstalled it. It is now perfectly centered. I’m not new to this game, just new to the Reba. Is everyone sure they are getting the wheel lined up properly? I know that seems like a silly question for experienced riders, but it solved my off-center issue.