There are many reasons why your tire will be off its balance. The purpose of balancing your tires to make sure that the rim and tire are synced as one unit. As you drive, you tires are dealing with pot holes, road rash and uneven surfaces. These conditions will cause your wheel weights to fall off, thus making your tires shake at certain speeds. Another series of balancing will be need to rectify it and provide you with a very comfortable ride. This must be done as frequently as possible. Come visit our location and we will take care of it.