The BMW R75 is a World Warfare II-era motorcycle and sidecar blend 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 submission from the German Army.
Preproduction types of the R75 were run by a 750 cc side 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 proved to be the basis 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 rear wheel of the motorcycle. These were fitted with a locking differential and selectable street and off-road products ratios through which all and invert gears did the trick. 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 own competitor the Z?ndapp KS 750 were both extensively 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 creating 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. In addition they arranged that the production of the R75 would stop once production come to 20,200 products, and from then on point BMW and Z?ndapp would only produce the Z?ndapp-BMW machine, manufacturing 20,000 each year.
Since the aim for of 20,200 BMW R75's was not reached, it remained in production before Eisenach manufacturing plant was so badly harmed by Allied bombing that production ceased in 1944. A further 98 systems were set up by the Soviets in 1946 as reparations.
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