Can I fit into the rides at Orlando theme parks?

You'll be fine! Disney World has large seats and can adjust the lap bars on most of the fast rides. They make sure everyone can have fun! If I can remember right, Sea World has 3 rides in Orlando, Atlantis has an adjustable lap bar and the seats are pretty wide. The other two rides should also be perfectly fine because the seats are like at Disney World and there's an adjustable lap bar. Busch Gardens have a mixture of water (raft type) rides so there's plenty of room on the rafts and roller coasters. Some of the roller coasters have the shoulder type of thing where it locks on your shoulders, but I've seen a lot of larger people go on and have a lot of fun. Aquatica is one of the funnest water parks and I think you'll be able to slide down every single slide they have. All the slides are pretty decently wide and could fit everyone. One thing you have to know if you do go to Island of Adventures Theme Park in Orlando is that Harry Potter and the Forbidden Journey has a test on each penger to see if the belt buckle works. It must click 3 times and I've heard a lot of people couldn't ride because of their wideness. I don't know the maximum weight for that ride, but you should always ask a worker if you ever feel uncomfortable about going on a certain ride. Have fun on your trip!!!