For 1955, International replaced the R-series light and medium-duty trucks with the S-series, ranging from the S-110 to the S-184 truck.
 The model line also included the Schoolmaster bus chassis, Travelall wagon, and Metro delivery van.
 Distinguished by a redesign to the front fascia, the S-series marked the introduction of four-wheel drive to light-duty vehicles.

During 1957, the S-series was replaced by the completely new A-series, forming the basis for International light trucks through 1968.
 The front sheetmetal of the S-series was adopted by the International Metro (used by its hooded Metroette variant) through 1962.
The S-184 continued production in Brazil until 1966 (when Chrysler purchased the Brazilian subsidiary of International Harvester).

For 1978 production, International revived the S-series name, using it on the medium-duty replacement for both the Loadstar and Fleetstar; the final model line designed by International Harvester, the S-series would be produced in various forms into the 21st century.
For 1955, International replaced the R-series light and medium-duty trucks with the S-series, ranging from the S-110 to the S-184 truck.  The model line also included the Schoolmaster bus chassis, Travelall wagon, and Metro delivery van.  Distinguished by a redesign to the front fascia, the S-series marked the introduction of four-wheel drive to light-duty vehicles.
During 1957, the S-series was replaced by the completely new A-series, forming the basis for International light trucks through 1968.  The front sheetmetal of the S-series was adopted by the International Metro (used by its hooded Metroette variant) through 1962. The S-184 continued production in Brazil until 1966 (when Chrysler purchased the Brazilian subsidiary of International Harvester).
For 1978 production, International revived the S-series name, using it on the medium-duty replacement for both the Loadstar and Fleetstar; the final model line designed by International Harvester, the S-series would be produced in various forms into the 21st century.
International R series