I think, is funny some snow tracks... like rally tracks, but with snow walls and the asphalt is snow too... only 1 or 2. I think its very difficult to do too.
The snow tyres, are tyres for snow tracks, the cars will have it, will be only the cars now can have rally tyres. Per example: BF1, in the life, can't have snow tyres... rally tyres too no. RB4 and more cars, can have rally tyres, then, they can snow tyres...

Is only a suggestion... very difficult to do...

I saw: " Event related: -Snow and ice" But i dont like it. I like snow tracks and tyres for snow tracks