Tannus Armour Tubeless Gravel Tire Insert - 700 x 33-47mm Single. Tannus Armour Tubeless inserts are the result of years of top level multi-cell foam manufacturing mixed with extensive professional riding experience. At the heart of Tannus is the patented Aither Technology; a multi-cell foam compound that forms the structure of the Armour. The inserts are designed to displace small impacts while offering a spring-like rebound for a smooth yet playful ride.

3% Faster than standard tubeless

Flexible sidewall stabilizing "Wings" for smoother ride quality with 50% more vibration damping

20mm of rim protection

Not a sealant sponge – keeps sealant where it belongs

Easy Installation (5 Minutes No tools required)

150g - About as much as a standard tube (a little lighter)