An adult and a child can ride together, however, two adults cannot ride together (because there is a weight limit). To ride solo, you must be between 54 and 84 inches (so the height restrictions are between 5-foot-4 and 7-feet) and at least 9 years old. To ride together, the youngest a rider can be is 3 years old. The second rider must be 16 and at least 54 inches tall and the maximum weight allowed is 375 pounds.