We all know that mixing crossply and radial tyres is a bad idea. There are very few crossplys on the market now and no need to fit them. But those of us of a certain age are forever scarred by the public information films of their youth visualising accidents from incorrectly mixed tyres and are reminded of this whenever tyre damage is mentioned.
I understand the difference in construction of the tyres, and the effects of this construction on the individual tyre. It is quite obvious that mixing them on the same axle would be a poor idea. It seems as if it would make the car very susceptible to roll.
However, if I remember the films correctly, there is a combination of tyre mixtures which is legal. I think crossplys on the front and radials on the rear? Is that correct? Why is this combination safe, whereas the other way around it is not?
How is the handling affected in the two cases of axles with non-mixed tyres, but with different kinds on different axles? What is the underlying dynamics of the issue in such cases?