Nitrogen tire inflation is used in the aerospace and racing industries and is beginning to make inroads into the long haul trucking industry.
There are several compelling reasons to use pure nitrogen in tires. Scientifically, nitrogen molecules are bigger than air molecules, thus nitrogen escapes a tire more slowly. Therefore, nitrogen is less likely to migrate through tire rubber than is oxygen, which means that tire pressures will remain more stable over the long term.
The stabilization of tire pressure will result in an increase in fuel economy. A recent study performed by the Canadian government found that nitrogen inflated tires can decrease annual fuel consumption between 2 – 6 percent. This drop in fuel consumption will result in fuel cost savings and greenhouse gas emission reductions.
Additionally, the Canadian study determined that nitrogen increased tread life by 86 percent (new and retread casings), thereby extending tire life and reducing tire retreading or replacement costs.