The BMW R75 is a global War II-era motorcycle and sidecar combination produced by the German company BMW.
Within the 1930s BMW were producing a number of popular and impressive motorcycles. In 1938 development of the R75 were only available in reaction to a question from the German Military.
Preproduction models of the R75 were powered by a 750 cc area valve engine, which was based on the R71 engine motor. However it was quickly found essential to design an all-new OHV 750 cc engine unit for the R75 unit. This OHV engine motor later proved to be the basis for subsequent post-war twin BMW engines like the R51/3, R67 and R68.
The 3rd side-car wheel was motivated with an axle linked to the rear wheel of the motorcycle. These were equipped with a locking differential and selectable road and off-road products ratios by which all four and reverse gears performed. This made the R75 highly manoeuvrable and capable of negotiating most surfaces. 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 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 Army, agreed upon standardization of parts for both machines, with a view of eventually developing a Z?ndapp-BMW hybrid (chosen the BW 43), when a BMW 286/1 side-car would be grafted onto a Z?ndapp KS 750 motorcycle. In addition they arranged that the produce of the R75 would stop once production reached 20,200 items, and after that point BMW and Z?ndapp would only produce the Z?ndapp-BMW machine, making 20,000 each year.
Since the concentrate on of 20,200 BMW R75's had not been reached, it remained in production until the Eisenach manufacturer was so terribly damaged by Allied bombing that development ceased in 1944. An additional 98 models were set up by the Soviets in 1946 as reparations.
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