Could be, but I put all new Dayton wheels, adapters & knockoffs on the Stag and tightened the knockoffs just a few hits (Stags have safety knockoffs, so I used an original steel knockoff wrench and ~2 pound brass hammer). A year later, although the knockoffs were still quite tight, there was visible wear on the splines.
If I ever do get that car back on the road, I'm going to keep them tighter as per the Dayton instructions.