Tubeless Performance Inserts Black 2.6-3.0"The Gnarly Tubeless Performance Inserts gives your rim the ultimate protection against impacts and prevents burping. Once you have installed these inserts, you will have confidence on the trails to nail the jumps and hard stuff! They are super lightweight and come in at less than 100 grams each. These inserts can fit a gravel bike, or an ebike or even a mountain bike. NO GIMMICKS, NO BS. If its Gnarly, it Works! Why do my tyres squirm? Why are my