In the late 60's early 70's Aj's made several variations of both front and rear aluminum wheels/tires,.....the rears were in both silicone (multiple colours) and in sponge (black) both in two widths.
The fronts had "O" ring tires on aluminum wheels and came in independently rotating and solid axle variations, using threaded axles with lock nuts (solid axle), and a non threaded axle for the the independently rotating fronts,.....there was also a solid axle variation for their press on aluminum fronts.
In the late 60's , I had a part time job at a local HO commercial track, and we sold tons of these.
c-vroom,......yours appear to be the mid/late 60's (first release) from Aj's,...threaded axle/lock nuts, but, the flanges do appear to be a bit wider than what I remember, ( my memory is questionable),so, they may be from another manufacturer,....(there were a few at the time), and the non "0" ring tires on yours, suggest that either the "0" rings have been replaced, or, the wheels/tires are from another manufacturer.
Cheers
Chris Walker
A late 60's independently rotating set,..........
An early 70's (solid axle) press on wheel set.
Sorry,.....but I do not have a handy pic., of the threaded front wheel (your example) handy.