Cargo bike conversion kit: easily turn your bike into a tricycle
Best kit bolt on Trike conversions for motorizing? - Motorized Bicycle Engine Kit Forum | Trike kits, Trike, Bicycle engine kit
Motorcycle Aluminum Rickshaw 20 Inch Conversion Kit Adult Cargo Beach Two Seats Tricycle Cheap - China China Factory Bike, Adult Tricycle Supplier | Made-in-China.com