The ALL NEW HTX kit from Roadsmith trikes: For the new 2018 Goldwing 1800's — UNB Customs: Trike & Custom Shop
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
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