The ring is mounted in the tubeless tire and allows you to continue driving even if you puncture just as you do not have to use as much tubeless sealant and you also have the opportunity to drive with even lower tire pressure.

Also allows one to use less liquid and it therefore ultimately weighs pretty much the same as a regular tubeless setup.

The foam ring fits both 26 ", 27.5" and 29 "tires, as they are simply shortened in length.

They fit tires width 2.7 "- 4.0" and rims width 55 mm.

Lasts for many thousands of miles, as long as the tire is replaced when worn.