The outer road wheels of the Tiger all had the same structure although they were mounted on two different kinds of hub.
This is near the middle of one such wheel. At the left of the photo is the hub, which is not part of the wheel. Outboard of that we see two flat surfaces with a shallow trench between them, and at extreme right is the conical main face of the wheel.
This sectional diagram shows the same area and makes the structure clear. The hub and the nut are not drawn, but the bolt hole is sketched in (dotted lines).
This photo compares a real Tiger wheel to a Ustar wheel, at the same scale. Ustar have reproduced the ring of nuts quite well, but inside and outside it they added trenches and walls. The outside wall, in particular, is based on nothing at all and spoils the whole appearance of the wheel.
I don't see any practical way to correct this error. Sixteen wheels are affected.