Abstract: A pressure monitoring and adjustment device for automated monitoring and adjustment of tire pressure includes a housing configured to couple to a rim of a wheel. A power module, a microprocessor, an air pump and a receiver are coupled to and positioned in the housing. The microprocessor is operationally coupled to the power module. The air pump and the receiver are operationally coupled to the microprocessor. The air pump has an outflow tube fluidically connected to a stem valve of the wheel. A sensor unit is coupled to the rim and positioned in the internal space defined by the rim and a tire mounted to the rim. The sensor unit is configured for wireless transmission of pressure measurements to the receiver. The microprocessor is positioned to respond to pressure readings relayed from the receiver to motivate the air pump to send air via the outflow tube through the stem valve.