Wilson Ultra v4 Bumper & Grommet

This bumper and grommet set is designed specifically for the Wilson Ultra 100, 100L, and 100UL v4 models. It will not fit previous generations of the Ultra or other Wilson racquet lines.

You should replace your grommets if the bumper strip is worn down to the frame, if you notice cracks in the plastic, or if the string channels have become sharp or jagged. Replacing them prevents your strings from fraying prematurely and protects the graphite frame from court contact.

While it is possible to install these yourself, it can be tricky to get the bumper strip to sit perfectly flush against the frame. If you are comfortable handling tools and have patience, you can do it, but most players prefer to have their local pro shop install them during their next restring to ensure a clean, secure fit.

Replacing old, worn-out grommets with a fresh set will add a negligible amount of weight—usually less than a gram—so you likely won't notice a difference in the racquet's balance or swing weight. It is a standard maintenance procedure that restores the frame to its original factory specifications.

No, this set is an exact OEM replacement for the Ultra v4, so it maintains the original 16x19 string pattern. Using the correct grommets is essential for keeping your strings properly aligned and spaced according to the racquet's design.