The BMW R75 is a global War II-era motorcycle and sidecar mixture produced by the German company BMW.
In the 1930s BMW were producing a quantity of popular and impressive motorcycles. In 1938 development of the R75 started in response to a submission from the German Army.
Preproduction models of the R75 were power by way of a 750 cc area valve engine, that was based on the R71 engine. However it was quickly found necessary to design an all-new OHV 750 cc engine for the R75 unit. This OHV engine motor later became the basis for following post-war twin BMW engines like the R51/3, R67 and R68.
The 3rd side-car wheel was powered with an axle linked to the trunk wheel of the motorcycle. These were fixed with a locking differential and selectable road and off-road equipment ratios by which all four and reverse gears did the trick. This made the R75 highly manoeuvrable and with the capacity of negotiating most surfaces. Additional motorcycle manufactures, like FN and Norton, provided an optional drive to sidecars.
The BMW R75 and its own rival the Z?ndapp KS 750 were both broadly employed by the Wehrmacht in Russia and North Africa, though over time 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 upon standardization of parts for both machines, with a view of eventually making a Z?ndapp-BMW hybrid (chosen the BW 43), in which a BMW 286/1 side-car would be grafted onto a Z?ndapp KS 750 motorcycle. They also arranged that the produce of the R75 would stop once production reached 20,200 products, and after that point BMW and Z?ndapp would only produce the Z?ndapp-BMW machine, developing 20,000 every year.
Since the aim for of 20,200 BMW R75's was not reached, it remained in production until the Eisenach manufacturer was so terribly destroyed by Allied bombing that development ceased in 1944. A further 98 products were built by the Soviets in 1946 as reparations.
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