The BMW R75 is a global Warfare II-era motorcycle and sidecar blend produced by the German company BMW.
Within the 1930s BMW were producing a number of popular and highly effective motorcycles. In 1938 development of the R75 started in reaction to a question from the German Army.
Preproduction models of the R75 were driven by the 750 cc side valve engine, that was based on the R71 engine motor. However it was quickly found essential to design an all-new OHV 750 cc engine unit for the R75 unit. 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 powered with an axle connected to the rear wheel of the motorcycle. They were built in with a locking differential and selectable street and off-road equipment ratios by which all four and invert gears worked. 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 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 upon standardization of parts for both machines, with a view of eventually building a Z?ndapp-BMW hybrid (selected the BW 43), when a BMW 286/1 side-car would be grafted onto a Z?ndapp KS 750 motorcycle. In addition they arranged that the make of the R75 would cease once production come to 20,200 devices, and from then on point BMW and Z?ndapp would only produce the Z?ndapp-BMW machine, developing 20,000 each year.
Since the concentrate on of 20,200 BMW R75's was not reached, it continued to be in production until the Eisenach manufacturing plant was so badly destroyed by Allied bombing that creation ceased in 1944. An additional 98 units were put together by the Soviets in 1946 as reparations.
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