Adult tricycle 7 Speed, Three Wheel Bikes are made of high-quality iron,so that it can supports capacity up to 450 lbs. 【SIZE REFERENCE 】 -26" wheel tricycle suitable for rider height: 5' 3"-6'2". 【FLEXIBLE 7-SPEED TRICYCLE 】 - 3 wheel bikes for adults with seven-speed is for easy and quick speed change.