The BMW R75 is a World Battle II-era motorcycle and sidecar mixture made by the German company BMW.
In the 1930s BMW were creating a amount of popular and highly effective motorcycles. In 1938 development of the R75 started in response to a need from the German Military.
Preproduction models of the R75 were run by the 750 cc area valve engine, that was based on the R71 engine motor. However it was quickly found necessary to design an all-new OHV 750 cc engine unit for the R75 device. This OHV engine later proved to be 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 linked to the trunk wheel of the motorcycle. They were fitted with a locking differential and selectable road and off-road gear ratios by which all four and change gears worked. This made the R75 highly manoeuvrable and capable of negotiating most floors. Additional motorcycle manufactures, like FN and Norton, provided an optional drive to sidecars.
The BMW R75 and its competitor the Z?ndapp KS 750 were both generally 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 Military, agreed after standardization of parts for both machines, with a view of eventually building a Z?ndapp-BMW hybrid (specified the BW 43), when a BMW 286/1 side-car would be grafted onto a Z?ndapp KS 750 motorcycle. In addition they decided that the production of the R75 would stop once production reached 20,200 models, and after that point BMW and Z?ndapp would only produce the Z?ndapp-BMW machine, manufacturing 20,000 each year.
Since the goal of 20,200 BMW R75's was not reached, it remained in production until the Eisenach manufacturing plant was so badly ruined by Allied bombing that development ceased in 1944. A further 98 models were assembled by the Soviets in 1946 as reparations.
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