The Joovy Cocoon Fixed Jogging Wheel accessory is made exclusively for the Joovy Cocoon and CocoonX2 enclosed strollers. This 12.5 inch wheel easily converts the Cocoon into a jogging stroller. Just remove the two swivel front wheels, attach the fixed jogging wheel and you are ready to run! The Joovy Cocoon Fixed Jogging Wheel features: * Easily converts the Cocoon and CocoonX2 into a jogging stroller * Exclusively made for the Joovy Cocoon and CocoonX2 strollers * Other accessories sold separately: Trailer Hitch for bicycle and Cocoon Parent Organizer