Every time I have ever lived in a jurisdiction that allows studs, (Manitoba and Alberta)it's all four winter tires plus studs. IMHO given the carnage on the highways in Ontario in winter, four studded tires should be mandatory. Now there is a public safety initiative that infringes on our rights but that would actually have an effect in terms of reducing death and injury.

My favorite was four studded winter tires on my 1967 RS/SS Camaro Convertible when I lived in Banff Alberta for a few years. As good as any SUV and more fun in the summer!

The world cries out for such: he is needed & needed badly- the man who can carry a message to Garcia