I had a set of those alex wheels (I don't know it's the same model, I could go check, but whatever, they were cheap alex wheels...) on a bike that I just couldn't seem to go that fast on it, kept calling it my slow bike & my slow wheels. The bf thought it was all in my head.

I replaced the wheels, and gave him the rear one to use on his trainer as a trainer wheel... For whatever reason (he probably noticed it was slow), he took about the rear hub and found it completely full of grit. I really hadn't put much mileage on those wheels. I then used them on a commuter I built for a while, but I crashed and killed the rear wheel somehow. I still use it as a trainer wheel.