The BMW R75 is a World Conflict II-era motorcycle and sidecar combo made by the German company BMW.
Inside the 1930s BMW were producing a quantity of popular and impressive motorcycles. In 1938 development of the R75 were only available in response to a question from the German Military.
Preproduction models of the R75 were power by the 750 cc side valve engine, that was based on the R71 engine. However it was quickly found essential to design an all-new OHV 750 cc engine for the R75 unit. This OHV engine unit later became the foundation for succeeding 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 trunk wheel of the motorcycle. These were built in with a locking differential and selectable highway and off-road gear ratios through which all four and reverse gears performed. This made the R75 highly manoeuvrable and capable of negotiating most floors. A few other motorcycle manufactures, like FN and Norton, provided an optional drive to sidecars.
The BMW R75 and its own rival the Z?ndapp KS 750 were both greatly utilized by the Wehrmacht in Russia and North Africa, though over time 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 Military, agreed upon standardization of parts for both machines, with a view of eventually making a Z?ndapp-BMW hybrid (designated the BW 43), in which a BMW 286/1 side-car would be grafted onto a Z?ndapp KS 750 motorcycle. They also decided that the production of the R75 would stop once production reached 20,200 products, and after that point BMW and Z?ndapp would only produce the Z?ndapp-BMW machine, making 20,000 every year.
Since the target of 20,200 BMW R75's had not been reached, it continued to be in production before Eisenach stock was so badly destroyed by Allied bombing that creation ceased in 1944. An additional 98 systems were put together by the Soviets in 1946 as reparations.
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