Slsy Adult Folding Tricycles . 7 Speed Folding Adult Trikes with quick release for folding. This adult trike can be folded in half easily and efficiently for easy move and storage. 20″ wheel suitable for rider height: 4’8″ – 5’5″ . 24″ wheel suitable for rider height: 4’11” – 5’9″ . 26″ wheel suitable for rider height: 5’3″ – 6’2″. Please make sure the size is suitable before purchasing. Load capacity: 350lbs. Equipped with 7-speed trigger shifters and the Shimano derailleur. Providing a wide gear range and smooth shifting . making you more effortless and comfortable. Please contact us if you need assembly video. Slsy folding adults tricycles are equipped with user manual . assembly tool.