A fleet manager’s job is focused on the little things. A tenth of an MPG here, an extended maintenance cycle there—across a fleet, these seemingly small points can add up to significant profits. The same goes for truck tire inflation: a few PSI in the right direction can go a long way, while a few PSI in the wrong direction is potentially disastrous. Tires are one of the most expensive components of the truck, and so the importance of keeping them in the ideal shape should come as no surprise, especially considering the substantial weight that air is supporting.