The greatest worry about tires is flat-spotting, which is when the body weight of the car sitting on one spot flattens out a portion of the rubber on the tire. While flat-spotting isn't very likely to take place in two full weeks, if problems correct, a month of being stationary may be enough to lead to problems. Low tire pressure and also extremely winter can easily both contribute to the development of standard areas. Read more here recommend beginning by checking your tire stress and inflating all of them to manufacturing plant standard.