The Karosa ŠM 11 is completely different from its predecessor, Škoda 706 RTO, which had its engine in the front and two doors.

ŠM 11 is a model of Karosa Š series.

Its body is semi-self-supporting with frame and engine with automatic gearbox in the middle, right between the wheels.

About 9,900 Karosa ŠM 11 buses were made during its production.

[1] Some buses were also exported to Albania, Bulgaria, Hungary, Mongolia, Poland and Romania.