Dropping the pressure increases the contact patch of the tyre so in theory increases grip. Not sure how this works with low profile tyres though as there's not much sidewall to give
I agree. I was probably being too simplistic. I think compound and tread pattern plays the largest partNot sure i agree completely. Half the problem the meg has is the wide tyres hence sh!tbox cars with biscuit tin tyres flying passed on snowy days. You surely want a skinny tyre that cuts through snow rather than a big fat tyre that sits on top of it sliding around.