The BMW R75 is a World War II-era motorcycle and sidecar mixture produced by the German company BMW.
Within the 1930s BMW were creating a variety of popular and highly effective motorcycles. In 1938 development of the R75 started in respond to a need from the German Military.
Preproduction types of the R75 were driven by the 750 cc aspect valve engine, which was based on the R71 engine motor. Nonetheless it was quickly found necessary to design an all-new OHV 750 cc engine for the R75 device. This OHV engine unit later proved to be the basis for following post-war twin BMW engines like the R51/3, R67 and R68.
The third side-car wheel was driven with an axle connected to the rear wheel of the motorcycle. They were built in with a locking differential and selectable road and off-road gear ratios through which all four and invert gears did the trick. This made the R75 highly manoeuvrable and capable of negotiating most surfaces. Additional motorcycle manufactures, like FN and Norton, provided an optional drive to sidecars.
The BMW R75 and its rival the Z?ndapp KS 750 were both widely employed by the Wehrmacht in Russia and North Africa, though after a period of evaluation it became clear that the Z?ndapp was the superior machine. In August 1942 Z?ndapp and BMW, on the urging of the Army, agreed after standardization of parts for both machines, with a view of eventually developing a Z?ndapp-BMW hybrid (specified the BW 43), in which a BMW 286/1 side-car would be grafted onto a Z?ndapp KS 750 motorcycle. In addition they arranged that the make of the R75 would stop once production reached 20,200 units, and after that point BMW and Z?ndapp would only produce the Z?ndapp-BMW machine, manufacturing 20,000 each year.
Since the concentrate on of 20,200 BMW R75's was not reached, it remained in production before Eisenach manufacturer was so terribly damaged by Allied bombing that production ceased in 1944. A further 98 items were put together by the Soviets in 1946 as reparations.
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