The BMW R75 is a global Warfare II-era motorcycle and sidecar combination made by the German company BMW.
In the 1930s BMW were creating a number of popular and impressive motorcycles. In 1938 development of the R75 started in respond to a need from the German Military.
Preproduction types of the R75 were run by way of a 750 cc area valve engine, that was based on the R71 engine motor. However it was quickly found essential to design an all-new OHV 750 cc engine for the R75 unit. 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 linked to the rear wheel of the motorcycle. They were fitted with a locking differential and selectable road and off-road items ratios through which all and invert gears worked well. This made the R75 highly manoeuvrable and capable of negotiating most areas. A few other 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 greatly employed by the Wehrmacht in Russia and North Africa, though over time of analysis it became clear that the Z?ndapp was the superior machine. In August 1942 Z?ndapp and BMW, on the urging of the Military, agreed after standardization of parts for both machines, with a view of eventually developing a Z?ndapp-BMW hybrid (designated the BW 43), in which a BMW 286/1 side-car would be grafted onto a Z?ndapp KS 750 motorcycle. In addition they agreed that the manufacture of the R75 would stop once production come to 20,200 items, and after that point BMW and Z?ndapp would only produce the Z?ndapp-BMW machine, processing 20,000 each year.
Since the aim for of 20,200 BMW R75's was not reached, it remained in production until the Eisenach factory was so terribly harmed by Allied bombing that development ceased in 1944. An additional 98 models were constructed by the Soviets in 1946 as reparations.
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