sometime the way you store the winter tires may cause the vibration. the sometime go flat on one side, depending the how they were stored. any tire shop should be able to tell you if the tires are in bad shape
The other possibility, and this happened to me on my old car, if you rotated your tires, you may find that the tire that was on the rear last year, is out of balance. When you put it on the front, it is now more noticable. If you are willing to take the time, you can isolate the bad tire and only rebalance that one. You can find hubcentric rings at most performance tire stores.
i don't know sounds like they did a "static" balance which they know is not as good as using clip ons but it looks better when there is no weights on the outside and some people just don't like using sticky's. i have quite a bit of experience in a couple tire shops and after reading your posts here i think most of it was laziness on the shops part. my old boss owned this tire shop for 10 years already and still he does not zero out truck tires on the balancer because it is a "waste of time" and does not zero out any tires even car tires during the busy season right before winter so it is very possible they are not balanced very good at all. and for those of you who don't know "zero" is when you spin the tire after you have put on the weights to make sure they are in the precisely correct place.
The AutoGuide.com network consists of the largest network of enthusiast-owned enthusiast-operated automotive communities.
AutoGuide.com provides the latest car reviews, auto show coverage, new car prices, and automotive news. The AutoGuide network operates more than 100 automotive forums where our users consult peers for shopping information and advice, and share opinions as a community.