Amazon.com : Black Trike Conversion Kit for 20 inch Bicycle. Comes with Two 20 inch Hollow-Hub Steel Wheel 36 Spoke. Tricycle, Trike, Three-Wheel Bike Conversion kit : Sports & Outdoors
Trailmate E-Kits / Tricycle Electric Conversion Kit
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
Trike conversion kit with differential for bicycle (part 2/2) - YouTube
RCC/PBE15: Cruzbike Shows Prototype Leaning Trike Conversion, Carbon Seat Box for Front Wheel Drive Recumbents - Bikerumor
Custom Electric Bike Kits 26inch 48v 1000w Electric Tricycle Conversion Kits - Buy Tricycle Conversion Kits,1000w E Bike Conversion Kit,1000w Electric Bike Conversion Kit Product on Alibaba.com