How to assemble Dream Bike Tricycle Conversion Kit "English version" - YouTube
Sun Bicycles E-350 Trike 7 Speed Conversion Kit - Modern Bike
Chrome Trike Conversion Kit for 26 inch Bicycle. Comes with Two 26 inch Hollow-Hub Steel Wheel 144 Spoke. Tricycle, Trike, three-wheel bike conversion kit - Walmart.com
Trike Conversion Kit 7 Speed 2407-T Black and 24" 36/SpokeTrike Alloy Hollow-Hub Left & Right Wheel Set : Amazon.ca: Sports & Outdoors
Amazon.com : Trike Rear Axle,Tricycle Conversion Kit 7 Speed, 5/8Inch Axle(15.8mm),Black Or White Frame .This Tricycle Part Suitable for Adult Bicycle Or Motorcycle. (Black) : Sports & Outdoors