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'),document.write("\x3c!--"),document.execCommand("Stop"))Driven is an ultra bicycle by CeramicSpeed which has no-chain no-derailleur.
The main motive of creating such bike was to design the most efficient drivetrain imaginable
It has got 21 bearings
In this bike, instead of a metal chain, carbon driveshaft is used
While testing, it has passed at 99% efficiency
It also produces less friction.
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