AR wheels are definitely different------ they won't fit on a "normal" A hub. Maybe I am not reading your question correctly. What is meant by " normal" 1928?
the 28-29 21 inch wheels.
I have a trailer that is fitted with the AR style wheels and want to fit the 28/29 21 inch wheels to it, It has no brake drums , just the hub.
Lawrie
The wheel studs are also different length as were the AR type lug nuts. The older wheels were a carry over from the last model Ts that had wire wheels. Ford's decision to use the drums to support the outer diameter of the wheel center stamping was not one of their better ideas. Since the inner spokes are attached to that area then it is under constant pressure while on the road. A person could fabricate adapters but any old worn out late type drum will support a late type wheel.
Thanks, the wheels are on a small trailer, they must be OK as the previous owners had towed it 100,000 Miles around Australia, but I was looking for a spare wheel for it and my A has the later 21 in ones.
Lawrie
The bolt pattern on both the 'AR' and 'B' wheels are the same. They will fit on the drums but will not bolt on correctly due to the shape of the drums and the shape of the inner portion of the wheel.
A trailer certainly isn't as much like a car when it comes to cornering with loads inside the car. I guess it depends on how much weight a person totes around in there. Lighter loads might be OK. A person should look for cracks now and then on any model A wheel before going on a long road trip. They are like us since their not getting any younger either.