Well I think you should change your tires to triangular blocks of wood and see how that goes.
Buy new ones! Out of round tires is a defect in the tire. Demand that the place that sold you the tires replace them. I am assuming you have not slammed on the brakes and slid the tires far enough to flat spot them. Tires can be shaved to make them round again but doing this causes a loss of rubber and they will wear out sooner.
Tires
Fling them away and get new ones.
Round Ones
Tires are made for the conditions that they are driven in. Therefore if you live in an area that has cold winters, that is it snows for a large portion of the winter, you probably should purchase winter tires. If you are living in Florida for example winter tires would not be required and year round tires would be sufficient.
Tires are the round inflatable rubber rings that are fitted around a vehicles wheels (rims) to make a smoother ride.
round ones
it depends on the type of tire if it's round then it has feelings
scream The cars screamed round the bend.
the round rubber kind
Drive to a trusted tire shop and have them inspect the tires and wheels. Make sure they balance all 4 tires and check them for defects.
This is usually caused by disuse. That is, the equipment has not moved in so long that the tires have permanently (or semi-permanently) acquired a flat side.