The ride restrictions on the website state that "For safety reasons guests must be properly secured in the seat, which may not be possible for some guests with larger torso or thigh measurements." A selection of the biggest rides have a test seat outside them, and if you're above 1.95m and have a 51" chest, it is recommended you use the test seat provided at the entrance of these rides, as to avoid potential dissappointment prior to boarding. As far as I'm aware (do not quote me on this), the belt buckle on any of the restraints must be secured properly. However, there are some rides, such as Vortex, Samurai and SAW: The Ride that do not have seat belts, so there is a light provided which signifies whether or not the seat is able to accomodate a person of your said size (The SAW one beeps as well! )Hopefully you'll have a great day, my friend has very large legs, and an extra push on the Vortex restraints usually does the trick!I hope I've helped! ;)EDIT: Josh R beat me to post , but adding onto his point about Nemesis Inferno, the test seat outside is that of the larger modified seats, so if you fit into that, you should be fine!