M235i Winter Wheels/Tyres

[Nezquick]

Does anyone know what size/type of winter wheel and tyre combo will fit on an M235i? The ones from BMW are hugely expensive and whilst there are lots of BMW winter sets on eBay I'm not sure what will fit and what won't.

Going out in the car this morning with it showing -3 degrees made me rather aware that it'd be safer to get some on now.

Thanks

[Nezquick]

Great - thanks for your help.

Do they make a huge difference in this crappy weather?