Often hear that narrower tires with smaller rims(thus with higher side walls) are better at snowy and icy conditions.
How’s your real world experience for the matter?
I,ve tested winter tires and 4 seasons in the same day and condition but never had a chance to compare between two sizes with the same compound in the same condition.
If you just change the width (by keeping the rim size same and compensating by changing aspect ratio) difference is very small for any normal use. And sometimes one is better than the other.
For spiked tyres narrower is better. But road studs are not the same. So this doesn’t apply to road studded tires. Or nonstudded tires.
A smaller rim will add to sidewall thickness and it’s better for any normal road/offroad use, especially during winter.
Oh! Ihad thought even without spikes narrow tire would be better in wet and sniwy conditions thanks for the infomation