BMW’s Latest Electric Bike Patent Has a New Twist

https://www.cycleworld.com/story/bikes/bmws-latest-electric-bike-patent-has-a-new-twist/

Courtsey: Cycle world, By Ben Purvis

Electric motorcycles might still be a rare sight on roadways but already we’re starting to see a “standard layout” across the majority of the models coming on the market. BMW, however—which is bracing itself for an onslaught of electric bikes in the near future—is heading out in a direction of its own.

In a typical layout for electric bikes, the motor is normally sited transversely across the chassis, just ahead of the swingarm pivot. From here it drives through a reduction gearbox—normally single-speed—and then a final drive belt to the rear wheel. Belts tend to be preferred over chains because they’re quiet, and with no exhaust to drown it out, chain rattle would become the dominant sound on a chain-drive electric bike.

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