1mm out of round isn't enough to be noticed unless you're riding with 23mm or smaller road tires. And I'm assuming that's not the case, since the rim is a Rhyno lite.
Also, as Soil Sampler notes, sometimes even a well-built wheel will have slight hops in the rim at the rim seam or by the valve hole - plenty of rims have that problem (which really isn't much of a problem).