The BMW R75 is a World Warfare II-era motorcycle and sidecar combo produced by the German company BMW.
In the 1930s BMW were producing a variety of popular and highly effective motorcycles. In 1938 development of the R75 started in reaction to a question from the German Military.
Preproduction models of the R75 were powered by way of a 750 cc area valve engine, which was based on the R71 engine. However it was quickly found essential to design an all-new OHV 750 cc engine for the R75 unit. This OHV engine motor later proved to be the basis for succeeding post-war twin BMW engines like the R51/3, R67 and R68.
The third side-car wheel was motivated 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 by which all and invert gears functioned. This made the R75 highly manoeuvrable and with the capacity of negotiating most floors. A few other motorcycle manufactures, like FN and Norton, provided an optional drive to sidecars.
The BMW R75 and its own competitor the Z?ndapp KS 750 were both extensively utilized 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 making 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. They also decided that the produce of the R75 would cease once production come to 20,200 systems, and from then on point BMW and Z?ndapp would only produce the Z?ndapp-BMW machine, developing 20,000 each year.
Since the target of 20,200 BMW R75's had not been reached, it continued to be in production until the Eisenach manufacturer was so badly destroyed by Allied bombing that production ceased in 1944. An additional 98 devices were put together by the Soviets in 1946 as reparations.
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