My sub frame cracked
It happened a few years ago I had a niu gts pro before it got renamed. Best scooter to rag about honestly didn't care about it.but the problem with niu was my sub frame cracked just due to cheap steel. And the swing arm also was getting really bad oxidisation and the electrics went a few years later. This scooter did take a beating. And it made it. I honestly can't recommend them.