The Freightliner FS-65 is a Type C conventional bus chassis manufactured by Freightliner, used for school bus and commercial bus applications. It was introduced for the 1997 model year for Thomas Built Buses. The FS-65 is most closely related to the Freightliner FL-Series medium-duty conventional.As the FL-Series was replaced by the M2 in 2001, Freightliner began work on the Freightliner C2.