You have to understand, that Demon wheels are so cheap because there OEM, so if your looking for longer lasting stronger wheels go eagles or grippers etc.
But if your looking for something less quality, go Demons.
For what its worth, in most scooter checks I see, I see Proto Grippers, and most all the better riders at my local park are running Grippers or Twizzlers. Well hope I helped.
demon wheels are da bombdiggity, ive had mine for like 2 months and they havent in the slightest started to dehub, chunk, crack, or get flat spots. relatively fast wheel, great price.... get them