A lot of people intuitively believe the more aggressive looking a tires tread design is, the better it will be in the snow. I've found this to not be the case. Most types of snow have very little shear strength so a tire with more, smaller, biting edges will generally perform better. Also, winter performance is largely dependent upon the rubber compound. If you live in an area with hot summers, the all-season radial that performs best in the snow will almost certainly have a very short tread life when used in very hot conditions, particularly if used for fast freeway driving. Also, an all-season radials snow performance will fall off considerably after the tire has been run in conditions that heat the tire up for long periods of time or through many heat cycles. This is because high temperatures cause the rubber to continue curing which will changes it's properties, sometimes drastically. Higher air pressures will reduce tire temperatures but perhaps not enough to prevent this loss of winter performance.
The tires you are thinking about will look cool but they won't hold a candle to actual winter tires. Sure they will get you through rough and muddy terrain but around town driving, dry Cornering and braking, wet cornering and braking will suffer. Not to mention that your gas mileage will suffer with a more aggressive tread.
And if you can get a good deal on a 17 x 6.5" wheel (the five spoke wheel from a first generation 3, for instance) then don't sweat the narrower width - a 225/65R17 tire will go on a 6.5" wide wheel just fine.
Does anyone have an opinion on the optimal wheel size for dedicated winter tires? I read that 19" winter tires are very expensive. Is 17" the sweet spot? Given a choice would it be better to go 18", or drop down to 16" or just stick with 17"?
Thanks!!
I drive mostly in Vancouver, BC (rarely snows) but do travel interior highway routes sometimes where conditions can be pretty bad. I had stock 17" Geolanders replaced with Nokian WRG3 SUV all weather tires at 16000KM. Mud+Snow or tires with snowflake symbol (winter or all weather) are mandated on some routes in BC well into spring (not really enforced to my knowledge but thats off topic). I have put about 14000KM on the nokians since last winter (they were great on ice/snow and no problems with hydroplaning in wet). Fuel economy not quite as good as with all seasons, but still good. I mostly put them on just to meet highway requirements. I try to simply avoid driving when conditions are poor. The best winter tires cannot stop someone from crashing into you. Tread wear has been minimal so far (on track to get 60000 KM -they are warrantied for 60 i think). I have had all seasons that have worn out faster. Will probably put the Geo's back on for next year and try to run them down over a spring/summer/fall before buying another set of nokians or similar. The nokians were not cheap tires. Paid about 1100 CAD installed. Probably cheaper in US. Have paid more for good all seasons on other vehicles. Overall I'd say the nokians are good value. Not sure if they are most aggressive but good for what they are.