What are the disadvantages of inflating car tires with nitrogen?

[VanIsaac]

Inflating car tires with nitrogen has the following disadvantages: 1. Oxygen residue: Under normal circumstances, car tires are inflated with air, and the nitrogen content in the air accounts for about 78%. Therefore, when inflating tires with nitrogen, the residual air will also make the nitrogen impure. The best practice is to vacuum the tires, but it is usually impossible to achieve a 100% vacuum, so there is still a very small amount of oxygen residue (1-2%). Correspondingly, the oxygen content in the tire needs to be reduced to about 2-3% to achieve a balance of partial pressure inside and outside the tire. Therefore, in reality, the purity of nitrogen required for tire inflation can only reach 95-98%. 2. Damage to the tire: During the vacuum process, the tire often deforms due to the vacuum. Those familiar with tires know that when vacuumed, the various structural layers of the tire, as well as the fabric and steel wires, will also deform, which may cause structural layer delamination and fabric or steel wire breakage. In other words, inflating with nitrogen can directly cause damage to the tire.