Help identifying a trailer axle

Dayton or lock ring. Dayton hubs can have Lock ring rims with tubes or tubeless and they can run side by side. Off the top of my head I thank they run like this. 10:00-15 and ??17.5. 10:00-20 and 11-22.5. 10:00-22 and 11-24.5. Through in R for radials is another subject.
They had some advantages. The torque on lug bolts was not so high. If carrying a spare and jack they could be changed with a 4 way lug wrench or 1/2" impact with an air hose to the trailer supply glad hand.
Does not really matter as there is a different class of drivers these days. NOT MY YOB MON NOT MY JOB!