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
Tricycle Conversion Kit 7 speed and disc brake | tricycleconversion
Amazon.com : Chrome Trike Conversion Kit for 12 inch Bicycle. Comes with Two 12" Hollow-Hub Wheel 36 Spoke. Tricycle, Trike, Three-Wheel Bike Conversion kit : Sports & Outdoors
Outlaw Series Basic Trike Conversion Kit - Fits All Models