NO FLATS, MAXIMUM PROTECTION: Tannus Armour tire insert works as a puncture-proof tire liner and bike tube protector, helping stop flats from thorns, goatheads, rocks, and debris while improving comfort on fat tire, gravel, and e-bike rides PATENTED AITHER FOAM TECHNOLOGY: Made from lightweight, high-tech multi-cell foam, this insert provides 15mm of top protection and sidewall support, delivering vibration dampening, better grip, and a smoother, quieter ride RUN-FLAT CAPABILITY & PINCH-FLAT DEFENSE: Ride with confidence knowing your tires gain run-flat support in case of a puncture and added protection against pinch flats, helping you finish your ride even with low or no air BETTER HANDLING THAN SOLID LINERS: Unlike solid rubber tire liners, Tannus Armour tire insert improves ride feel, control, and stability, supporting your bike tire and tube across different pressures while maintaining comfort, grip, and low rolling resistance for mountain, gravel, fat tire, and e-bike riding FAST, TOOL-FREE INSTALL: This Tannus Armour tire insert installs easily between your bike tire and inner tube in about 10–15 minutes per wheel, with no special tools required—simple to remove and reuse when changing mountain, gravel, fat tire, or e-bike tires and tubes Tannus Armour is the ultimate tire insert for riders who want maximum puncture-proof protection, performance, and confidence on every ride. Designed to sit between your tire and inner tube, this bike tube protector acts as a high-performance tire liner, providing 15mm of impact and puncture protection on top and 2mm of sidewall protection from sharp objects, rocks, thorns, and goatheads. Whether you ride a fat tire bike, e-bike, gravel bike, or hit the city streets, trails, or off-road terrain, Tannus Armour helps prevent flats and delivers a smoother, more comfortable ride with increased grip and vibration dampening. This no flat solution is ideal for riders who want fewer interruptions, more durability, and better ride quality across all conditions. Tannus has been developing advanced tire technology since 2003 and is the world’s number one brand in airless tire technology. At the heart of Tannus Armour is our patented Aither Technology—a multi-cell foam compound engineered to form the structure of the insert, combining lightweight performance with long-lasting protection for your tires and tubes.