Vivax Assist internal bike motor short version

>> YOUR LINK HERE: ___ http://youtube.com/watch?v=f3DvPaAIoJY

Here's a quick look at the Vivax Assist internal bicycle motor, which can be retrofitted and is housed in the seat tube of the bike. A good or bad thing for ...

vivax assist, bike motor, mechanical doping, ebike, electric bike motor
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