What's a RhinoDillo RhinoDillos Tire Liners are a tough way to prevent thorns and other road debris from getting to the precious air in your tube and flattening your tire. As the photo to the right demonstrates, placing a RhinoDillo between your tire and tube creates a virtually impenetrable layer to keep you riding flat free! Are they invincible No, of course not. A nail at the right angle can go through sheet metal. But - they are the toughest available (as you will see below), and they do stop 95% of sharp objects that would have otherwise ruined your day. A friction flat is a way of describing what happens when the edge of a tire liner with the overlapping ends rubs against the tube on the inner circumference and actually CAUSES a flat tire. With our new patent pending Soft-Tips , your tube will be protected from this flat-causing edge seen on all other brands of tire liners! RhinoDillos have been proven tougher in side by side tests by riders, dealers and Independent Labs! RhinoDillos come in new Pre-Relaxed packaging to make installation a snap when compared to other liners which want to curl back into a tight ball. Have you ever installed a tire liner that kept trying to roll back up Our new patent pending pre-relaxed packaging means you'll never have to wrestle with your tire liner again!