[literalAardvark]

If it's icy there's no difference at all. The only tyres that do anything on ice are the ones with spikes or chains.

If it's snowy a good modern all weather tyre can hold its own, but will brake a few feet later than a good winter tyre.

In all other conditions a good all weather is a lot better than winter tyres, and pretty close to a good summer tyre.

[ThrowawayTestr]

You must live in Florida or be a terrible driver. The difference between winter and all seasons is very apparent.

[Slothrop99]

Just pointing out - a lot of snowy areas are very aggressive about plowing (and salting). For most people this is probably like "don't drive tomorrow" and not some need for knobby snow tires.

[kjkjadksj]

Even when the road is dry the rubber compound is a lot softer on winter tires so you get significantly more grip than all season or summer in cold temps when they get hard.

[literalAardvark]

It is.

However the difference between winter and a modern all weather (it's a different class) isn't.

And yes, we're probably terrible drivers.

I do not live in Florida. 45N, continental winters.

I'm never using winter tyres again unless society breaks down and no one shovels the roads anymore.

[kjkjadksj]

There are laws of physics you can’t hand waive away. Winter tires are really more cold temp tires. The rubber formulation is different to allow for grip in the cold and dry (tread pattern for cold and snow). As such a winter tire wears heavily driven in the summer, rubber formulation is just too soft.

For an all season that level of summer wear would be unacceptable. So a different formulation is used to improve summer wear at the cost of the winter low temp performance. You can’t have it both ways, a long wearing summer performance and good sub 40 degree grip.

[literalAardvark]

Please read the studies in this thread.

Modern high quality all weather tyres are excellent in summer and winter.

Except on actual snow, where they're just ok, because of the hybrid sipe patterns, and ice, where they suck exactly as much as everything else except studded tyres (which suck on tarmac instead).

[kjkjadksj]

They are still worse than winter tires in cold dry conditions because the rubber compound is compromised to have acceptable summer wear.

[ThrowawayTestr]

Even after the streets are plowed there's still a bit of snow on the main roads and a lot on the side roads. Maybe you live in a place with really mild winters, but my car would have drifted into a ditch many times this winter if I didn't swap my tires.

[literalAardvark]

No one is saying to drive all year with your summers. Those will glass in winter.

[nucleardog]

I... Well, I had started explaining point by point how wrong this is but frankly the answer is just "all of it, very".

I've driven summer tires, all season tires, winter tires, and studded winter tires in every season in Canada. (Yes, I live in Canada and own borderline-usless summer-only tires. Yes, I've tried driving them in snow.)

None of what you're saying lines up with my own experience, various YouTube videos on braking distances, or literally anything else I've ever seen anywhere.

Edit: And, well, to be clear... I've lived on the West coast of Canada where it's a bit more mild but you're in the mountains, in the middle where it hits -50, and in the East where it only hits -30 but snows like hell.

[kalleboo]

There are also actual studies that show the difference https://link.springer.com/chapter/10.1007/978-3-031-66968-2_...

[literalAardvark]

Yes, there are. And they show that it's a trade-off well worth investigating. Do you really want 10% better performance on snow at the cost of 10% worse performance on tarmac?

How much do you drive on snow anyway? Probably nowhere near as long as you do on tarmac, even in a tough winter.