We've had about 5" over the last couple of days. Just
after the snow fell, I swapped my set of 17" Falken ZE512 for a set of Nokian RSi sport winter tires.
It's like night and day.
Before, I could keep the car on the road, but not without affecting my blood pressure. Driving over ridges of slush between lanes was a leap of faith.
Now I feel like I can drive through anything. I still have to drive with care, but now I feel like the car can handle it. Last night I got into and out of a parallel parking spot that would have been impossible without snows. No problems.
Yeah, the car doesn't look as good or handle as well, but if it means I still
have a car come spring, it's worth it. Without them, I'd give myself a 50:50 shot at doing some damage, given that I sometimes have no choice but to drive in poor weather.
The fact that my Style 5 rims are being spared the salt is just a bonus!
Oh, and IMHO, you
have to get a set of four. Snows on the rear only will help you keep the rear planted, but you want to be able to steer, don't you?
All the way to the tire place, I had the same debate with myself that you're having. On the way home, I knew I'd done the right thing.
That siping stuff probably does help a bit, but some of the claims they make re: longer tire life and better heat dissipation are specious to say the least, IMHO.
Lastly,
winter tires are FREE! Really, they are. In fact, buying new winter tires will
save you money! Here's how:
If you're like me, your summer tires in 17" cost ~$200 each. Good winters in 15" cost about half that or less. Every mile you put on the winters extends the life of your summers by one mile. Since the summers cost more, you are saving money with every mile you put on the winters. Every mile will make your
expensive tires last longer.
So to spend $500 on winter tires today is really an investment that will save you money in the long term. And this is even before factoring in rim and bodywork repair when you prang your baby while driving on summer rubber in the snow.
Just my two cents.