The material used for constructing your garage door rollers heavily affects their longevity. With this in mind, nylon rollers with steel ball-bearing last the longest. Consequently, simple plastic rollers with no bearings can last as little as a year or two. Moreover, Regular lubrication and a well-balanced door help keep your rollers in good shape. In that case, to determine whether your rollers need replacement, use your eyes and ears: loud, creaking noises when your door is in use, as well as traces of rust or deformation, are sure indicators that your rollers need changing.