The Tannus Armour Tire Insert is designed to provide you all the benefits of a tubeless set-up without the drawbacks of using and maintaining a sealant based system. Run low pressures for increased grip and a smoother more comfortable ride, all while protecting yourself from punctures, pinch flats and rim impact damage. Sitting between your tire and inner tube, the Tannus Armour provides 15mm of puncture protection on the top, as well as 2mm of sidewall protection from sharp objects and rocks. Whether you are a city rider, adventure tour rider, trail shredder, or downhill racer, Tannus Armour gives you increased protection, grip and vibration dampening for a smoother, more hooked up ride. Note: Tannus Inserts require that you use a smaller size tube than usual. Check the size chart to determine what size tube is correct for your setup. Features: Sold individually Puncture protection Rim protection Pinch-flat protection Sidewall protection Tire burp protection Anti-squirm Increased grip Fast rolling Smoother more comfortable ride Run flat capability Easy setup Requires minimum of 19mm rim width