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Karosa ŠM 11 is an urban bus produced by bus manufacturer Karosa from the Czech Republic, in the years of 1965 to 1981. It was succeeded by Karosa B 731 in 1981.

Karosa ŠM 11
Bus ŠM11 Brno(1).jpg
Historical Karosa ŠM 11 in Brno, Czech Republic
Body and chassis
Doors3, air-operated
Floor typeHigh-floor
Chassissemi-self-supporting with frame
EngineŠkoda ML 634 V6 Diesel engine
Škoda ML 630 V6 Diesel engine
Power output132.4 kW (178 hp) (Škoda ML 634)
152.4 kW (204 hp) (Škoda ML 630)
TransmissionPraga 2-speed automatic
Praga 5-speed manual
Length10,985 mm (432.5 in)
11,135 mm (438.4 in)
Width2,500 mm (98.4 in)
Height2,985 mm (117.5 in)
Curb weight7,800 kg (17,200 lb)-8,750 kg (19,290 lb)
PredecessorŠkoda 706 RTO
SuccessorKarosa B 731
Interior of Karosa ŠM 11

Construction featuresEdit

Karosa ŠM 11 is completely different from its predecessor, Škoda 706 RTO, which had engine in front and two doors. ŠM 11 is model of Karosa Š series. It is derived from Karosa ŠL 11 intercity bus, and also unified with long-distance coach Karosa ŠD 11. Body is semi-self-supporting with frame and engine with automatic gearbox in the middle, between the wheels. Only rear axle is propulsed. Front axle is independent, rear axle is solid. All axles are mounted on air suspension. On the right side are three folding doors (first are narrower than middle doors). Inside are used leatherette seats. Drivers cab is not separated from the rest of the vehicle. In the rear part is room for a pram or wheelchair.

Production and operationEdit

In 1965 started serial production, which continued until 1981.

ŠM 11 are not operated in public transport anymore, but many of them are operated as historical vehicles. Last Karosa ŠM 11 in Prague was retired in 1987, and last ŠM 11 in Czech Republic was retired in 1994 in Opava. About 9900 of Karosa ŠM 11 was made during its production.[1] Some buses were also exported to Albania, Bulgaria, Hungary, Mongolia, Poland and Romania

Historical vehiclesEdit

Czech Republic:

  • Prague transport company (bus, no.7135, year 1981)
  • Technical muzeum Brno (bus ex. Brno transport company no. 2834)
  • Ostrava transport company (bus no. č. 5842)
  • Zlín (bus ex Prague transport company no. 7174)
  • Plzeň (bus ex Plzeň transport company no. 145)
  • Busline (bus ex transport company Teplice no. 46)


  • Bratislava (bus no. 3350)
  • private collector (bus ex Prague transport company no. 5123)
  • KHA Bratislava (bus ex Bratislava transport company no. 1382)
  • private collector (pbus ex transport company Plzeň no. 135)


  1. ^ "Autobusy Karosa – 6. díl – ŠM 11 a 16,5" Československý dopravák issue 4 2007 page 22

See alsoEdit