The BMW R75 is a World Warfare II-era motorcycle and sidecar mixture made by the German company BMW.
Within the 1930s BMW were creating a number 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 power by a 750 cc area valve engine, which was based on the R71 engine unit. Nonetheless it was quickly found essential to design an all-new OHV 750 cc engine for the R75 product. This OHV engine later became the basis for following post-war twin BMW engines like the R51/3, R67 and R68.
The 3rd side-car wheel was driven with an axle connected to the rear wheel of the motorcycle. These were built in with a locking differential and selectable street and off-road products ratios through which all and invert gears proved helpful. This made the R75 highly manoeuvrable and capable 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 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 upon standardization of parts for both machines, with a view of eventually building 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 agreed that the make of the R75 would cease once production reached 20,200 items, and after that point BMW and Z?ndapp would only produce the Z?ndapp-BMW machine, manufacturing 20,000 every year.
Since the focus on of 20,200 BMW R75's had not been reached, it continued to be in production until the Eisenach manufacturer was so badly broken by Allied bombing that production ceased in 1944. An additional 98 models were constructed by the Soviets in 1946 as reparations.
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