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
RCC/PBE15: Cruzbike Shows Prototype Leaning Trike Conversion, Carbon Seat Box for Front Wheel Drive Recumbents - Bikerumor
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Electric tricycle conversion kit | Solaremobility
Black Trike Conversion Kit for 20 inch Bicycle. Comes with Two 20 inch Hollow-Hub Steel Wheel 72 Spoke. Tricycle, Trike, three-wheel bike conversion kit - Walmart.com
Tricycle Conversion Kit (SY-ZHB01) - China Tricycle and Tricycle Conversion Kit