While there is no specific "maximum weight" for Harry Potter attractions like Forbidden Journey or Hagrid’s Magical Creatures Motorbike Adventure, there are physical size restrictions based on the ride's safety restraints. Because the seats use over-the-shoulder harnesses or lap bars that must "click" into a specific position, guests with certain body shapes—specifically those with larger chests, waists, or heights—may be unable to ride. For example, Harry Potter and the Forbidden Journey is notorious for its restrictive seating. Most Universal parks in 2026 provide "Test Seats" at the entrance of these attractions; it is highly recommended to try these first to ensure the restraint can be properly secured. The standard limit is often cited around a 40-inch waistline, but this varies significantly based on individual proportions. If you are unsure, a "Team Member" at the ride entrance can provide a discreet check to confirm you can ride safely.