Add an extra layer of protection between your rim and tubeless gravel tire with the 700c Gravel Tubeless Tire Insert. The Tannus Armour insert is constructed with the proprietary Aither material, a high-quality polymer compound that reduces vibrations, providing you with a smoother ride down the trail. Tubeless tires are able to be run at a lower PSI, allowing for a lower chance of a flat tire during your ride.