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The BMW R75 is a World War II-era motorcycle and sidecar combination produced by the German company BMW.

In the 1930s BMW were producing a variety of popular and highly effective motorcycles. In 1938 development of the R75 started in respond to a question from the German Military.

Preproduction types of the R75 were powered by way of a 750 cc side valve engine, that was based on the R71 engine unit. Nonetheless it was quickly found necessary to design an all-new OHV 750 cc engine motor for the R75 product. This OHV engine later became the foundation for subsequent post-war twin BMW engines like the R51/3, R67 and R68.

The third side-car wheel was driven with an axle linked to the rear wheel of the motorcycle. They were fixed with a locking differential and selectable highway and off-road gear ratios by which all four and invert gears worked well. This made the R75 highly manoeuvrable and with the capacity of negotiating most floors. 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 extensively used by the Wehrmacht in Russia and North Africa, though over time 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 making 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. They also decided that the make of the R75 would stop once production come to 20,200 items, and from then on point BMW and Z?ndapp would only produce the Z?ndapp-BMW machine, processing 20,000 every year.

Since the goal of 20,200 BMW R75's had not been reached, it remained in production until the Eisenach factory was so terribly harmed by Allied bombing that creation ceased in 1944. An additional 98 items were assembled by the Soviets in 1946 as reparations.

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