I was too hasty to label them as buggy wheels. At least on paper the diameter is slightly larger.
I have a set of paddle tires for my 2WD buggy and they measure 95 mm between the tips of opposite paddles. But they are an unusual example.
Measuring some mounted Schumacher Mini Pin 1s I have...
The tires are 1/10 buggy-sized. The exact diameter can be figured out from the picture when you reference a known measurement, for example the wheelbase.