Bought a new M20 2.0 and the speed was cutting off at 21mph. I contacted Engwe about this and after sending them some pics, they concluded I had the wrong controller in the bike and sent a new controller and now it runs @ 30mph, which I feel that is still not the top speed of this bike, but it is what it is. Only wish Engwe had more distributors where you could take it your bike and have service done on it as even changing out a controller could be overwhelming for some people.
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