narf
Sgt. Maj. Buzzkill
Yup, to handle standing water and slush better.
It is possible that a tire started to bulge and that could cause that vibration, even if the bulge is unnoticeable with the naked eye. This is what happened to me at the end of the summer and I had experienced similar symptoms. I went to three different shops to re-balance the tire and only at the third shop I was told that there's a problem with the tire itself. I bought all 4 tires brand new in march, so I got it replaced on warranty.
I also fitted my winter wheels a week ago because we had some cold days(+1 to +7 degree C) and with my summer tires the ESP/ASR light started flickering very easy when starting from traffic lights, during summer I never saw the ESP light on when leaving from a traffic light. On winter tires the things came back to normal but the ride feels more bumpy and the road noise increase is really noticeable in my case too. My summer tires are Dunlop SP Sport FastResponse 205/55 on 16"x7j wheels and my winters are Dunlop SP Winter Sport 3D 205/55 on 16"x6.5j wheels.
And that wider gap causes more noise on dry pavement too.
I think I might be going crazy here but...I can tell a definite change in ride quality depending on weather. We have warm days in the high 60C (16-17C) and the car rides like shit. Harsh and bumpy. Then we have cold days, highs of 40-45F (under 10C) and the car feels smooth and rides comfortably on the road. It really feels like a different car in the cold.
Am I crazy or what?
Well, you can get alloys on varying widths too, and most of the winter time driving is done on tarmac anyway, so having wide winter tires is not that bad idea. It's true that 155 wide is better on ice than 225, but in the end you can have larger affect on your driving behaviour.
On the other news, I've been enjoying Nokian Hakkapeliitta 7s couple of weeks. Not very good on tarmac, but they offer nice grip and behave nicely when honed. Also according to my previous experiences with Hakkapeliitta 4s the studs hold all the abuse pretty well.
pfft, 175/65/14 here. Fantastic in snow; fun around corners; terrible in a straight line.