Remember when Ninebot released a kit that turned their Minibot hoverboard into a functional go-kart? Yeah, that was awesome, turning an erstwhile novelty ride into a motorized four-wheeler you can race around a track. The Ninebot GoKart PRO takes that clever kit and turns it into a full-fledged vehicle for racing around the tracks.
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https://www.coolthings.com/ninebot-gokart-pro-drift-like-a-pro-23mph/