That's almost 6% in this group alone. Any defect rate over 2–3% is generally considered poor for a consumer product.
I know Amflow is technically a bike company, but it's backed by a tech company whose primary goal was introducing its drive system, not building a bike brand. I'm sure Amflow...
Yep, I noticed the OP said, "I've bought mine in Hong Kong. So it's the Chinese version. The seller just doesn't respond to my messages."
It sounds like someone imported a genuine AMflow that was intended for the Chinese/Hong Kong market and resold it internationally. The bike itself is...