Tire injection typically lasts around six months or up to 2 years, depending on the type and size of the tire being treated, its use, and environmental conditions. It is important to have your tires checked every few months in order to ensure that the tire injections are still effective. In addition, it is recommended to rotate your tires often for even wear and tear. Tire injection can significantly extend the life of a tire, helping it to last longer and perform better over time.