Huck Norris Standard Protective Rim Insert – Tubeless 27.5 / 29″ Large Fits 34-45 mm Pair. Huck Norris inserts protect your tubeless tires from snakebite punctures and your rims from dents. The specially formulated inserts take the brunt of the abuse when the tire bottoms out on rocky terrain or on hard landings. Choose your insert based on internal rim width and trim to fit your wheel diameter.