The BMW R75 is a global Warfare II-era motorcycle and sidecar blend made by the German company BMW.
Inside the 1930s BMW were producing a variety of popular and highly effective motorcycles. In 1938 development of the R75 were only available in reaction to a need from the German Military.
Preproduction models of the R75 were power by the 750 cc area valve engine, which was based on the R71 engine unit. However it was quickly found essential to design an all-new OHV 750 cc engine unit for the R75 device. This OHV engine motor later became the basis for following post-war twin BMW engines like the R51/3, R67 and R68.
The third side-car wheel was influenced with an axle connected to the trunk wheel of the motorcycle. They were installed with a locking differential and selectable road and off-road products ratios by which all and reverse gears worked. This made the R75 highly manoeuvrable and capable of negotiating most floors. 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 greatly used 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 Military, agreed upon standardization of parts for both machines, with a view of eventually setting up a Z?ndapp-BMW hybrid (selected the BW 43), when a BMW 286/1 side-car would be grafted onto a Z?ndapp KS 750 motorcycle. In addition they decided that the manufacture of the R75 would stop once production come to 20,200 products, and after that point BMW and Z?ndapp would only produce the Z?ndapp-BMW machine, processing 20,000 every year.
Since the goal of 20,200 BMW R75's had not been reached, it remained in production before Eisenach stock was so badly broken by Allied bombing that development ceased in 1944. An additional 98 systems were assembled by the Soviets in 1946 as reparations.
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Troika Montauk – BMW Motorcycle Magazine
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