31 Jan '16, 2am

動画にあるけどどこまで現実的なんだろう『Gruber Assist - Doped Electric Bike https://t.co/XyJJsXXE0S

The auxiliary drive, with a length of almost 8.5 inches and 200 watts of power, is permanently connected with the crank through a bevel gear unit. Not only is gear changing is still possible, but you are also able to use the motor assist through the pedals. This system has a 100% freewheel so that when the motor is not activated, the bike simply acts like a regular bike. When the system is on, the rider gets electrically boosted by the Gruber Assist, with 200 watts of extra power.

Full article: https://www.electricbike.com/gruber-assist/

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すごいのあるんだね。 https://t.co/HB0VEN5SL8

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