Worksman Port-o-Trike Single Speed Adult Tricycle Stable, user-friendly, single-speed adult tricycle offers easy on and off and smooth ride. Most compact adult tricycle on the market; folds for convenient storage and portability. Designed for optimal portability, and fits most standard trunk-mounted bicycle car racks, or inside most minivans and station wagons. Thanks to 20-inch wheels and low center of gravity. Measures 30-by-31-by-29-Inch (W x H x D) folded, 215-pound maximum user weight. Easy step-through frame ideal for riders.