16" 8 lug trailer wheels come in several different brands and have changed a bit over the years....in particular the center hole and lug holes size.
My newer 16" 8 lug steel wheels on my newer GN equipment trailers have a larger center hole and lug holes than my older GN trailers with 16" 8 lug wheels. My equipment trailer mfg gave me a heads up some years back on possible problems shifting spare wheels between trailers.
I have a pair of old 16" 8 lug trailer wheels that came from some of my work trailers from the '70s that have very small lug holes and won't work on any of my newer trailers with Dexter or Rockwell American 16" 8 lug axles.
You have the wheels so try one on for proper fitment before hitting the road.