I need to go stare at my bike but I don't think the rim should be centered in the SA. The SA isn't symetrical. The goal is to get the rear wheel centered with the front wheel but I don't think it is a huge problem if it is off by a few MM. It is more important to have chain to tire clearance. If you want to change it just grab a spoke wrench and loosten up all the spoked on one side by 1/2 turn while tightening them the same amount on the other side. Repeat until you are happy.outrider said: