I can give a road-ish example, though. A set of 700x25 Continental Ultra Races would not seat evenly on my Araya 20As, despite my attempts at overinflating, deflating and massaging the sidewalls up and down, etc. They always had a slight hop when inflated to the specified pressure and ridden. While Ultra Races aren't their top-of-the-line road tire, I don't think inferior construction was necessarily to blame.