The BMW R75 is a World Warfare II-era motorcycle and sidecar mixture made by the German company BMW.
In the 1930s BMW were creating a quantity of popular and highly effective motorcycles. In 1938 development of the R75 started in response to a need from the German Military.
Preproduction types of the R75 were run by way of a 750 cc side valve engine, that 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 unit. This OHV engine motor later became the foundation for following post-war twin BMW engines like the R51/3, R67 and R68.
The 3rd side-car wheel was powered with an axle connected to the trunk wheel of the motorcycle. These were fitted with a locking differential and selectable highway and off-road equipment ratios through which all and invert gears proved helpful. This made the R75 highly manoeuvrable and with the capacity of negotiating most areas. 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 analysis 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 creating 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 arranged that the manufacture of the R75 would stop once production come to 20,200 items, and after that point BMW and Z?ndapp would only produce the Z?ndapp-BMW machine, developing 20,000 each year.
Since the aim for of 20,200 BMW R75's had not been reached, it remained in production before Eisenach factory was so terribly ruined by Allied bombing that creation ceased in 1944. A further 98 units were assembled by the Soviets in 1946 as reparations.
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