what causes a knot on the side of your tire
Whatâs a sidewall bubble? First of all, the sidewall of your tire is simply the side of your tire, and the place where all your tireâs markings are contained. A bubble in the sidewall is exactly what it sounds like, a visible pocket of air or bulge thatâs formed on the side of the tire. Causes of Sidewall Tire Bubbles Like most bubbles, a tire sidewall bubble is caused by air thatâs not supposed to be there. If damage to any tire layers occurs, air can permeate through the layers, making a home for itself within the sidewall. Sometimes, tire material separation can be caused by normal wear-and-tear of a tire; other times, the separation may be ...