The BMW R75 is a World Conflict II-era motorcycle and sidecar combination made by the German company BMW.
In the 1930s BMW were producing a volume of popular and highly effective motorcycles. In 1938 development of the R75 started in respond to a question from the German Military.
Preproduction types of the R75 were driven by the 750 cc area valve engine, that was predicated on the R71 engine. Nonetheless it was quickly found necessary to design an all-new OHV 750 cc engine unit for the R75 unit. This OHV engine later became the basis for subsequent 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 rear wheel of the motorcycle. They were equipped with a locking differential and selectable highway and off-road gear ratios by which all four and invert gears worked well. This made the R75 highly manoeuvrable and with the capacity of negotiating most areas. Additional 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 broadly 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 after standardization of parts for both machines, with a view of eventually setting up a Z?ndapp-BMW hybrid (selected 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 make of the R75 would cease once production reached 20,200 models, and from then on point BMW and Z?ndapp would only produce the Z?ndapp-BMW machine, making 20,000 every year.
Since the aim for of 20,200 BMW R75's had not been reached, it remained in production before Eisenach stock was so terribly damaged by Allied bombing that development ceased in 1944. An additional 98 items were constructed by the Soviets in 1946 as reparations.
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