Maintaining proper air pressure in tires is one of the easiest ways to extend tire life and maximizing fuel efficiency. Fleets have adopted a number of methods to stay ahead of this important aspect of tire maintenance. Almost 53% of the survey respondents indicated they performed tire pressure checks on a regular schedule. Nearly a third indicated they use a tire pressure maintenance system on trailers. Tire inflation systems on trailers are growing in popularity. Nearly 28% of those fleets surveyed mentioned a specific system for maintaining air pressure automatically on their trailers.