> you also get a more even tread ware since it's a pure gas.

Please explain the mechanism behind this.

> the longevity of the tire can improve up to 75%, since there is no oxygen, moisture, etc. to ware the rubber

Virtually all the limitations on tire longenvity are due to rotting, cracking, and hardening on the outside of the tire from UV and other environmental factors, not the inside of the tire.