Find it on Amazon. Booyah Single Handlebar Organizer/Cupholder sold separately. Unlike other trailers these trailers connect to the axle and not the frame of the bike. Connecting to the frame can bend your frame and wear the paint. Bike stroller and bike trailer. Remove front wheel when used as a trailer. Bike arm swings out from underneath. Size: Medium up to 60 lbs. Although it may be able to hold the weight of your pet, it does NOT mean your pet will fit inside the trailer. Please see that it can fit within the interior dimensions. Max size of pet is about 30lbs. Interior dimensions 26l x 18w x 18 h inches Overall dimensions 46l x 26w x 37 h inches Overall trailer weight 28lbs. Add 3lbs for stroller weight (front tire and handle bar) Front mesh window opens to allow pets head to stick out. Inside leash to contain your pet. Comes with stroller accessories (front 10 inch front SWIVEL pneumatic wheel and adjustable handlebar) 15.5 inch quick release rear tires. Remove with a push a button. Rain/Windcover 3 layer sunroof. Closed/Mesh Screen/ Open Safety Flag Adjustable handlebar Reflectors on front back and tires with side reflecting strips Bike attachment arm swings from underneath. Bike hitch Side storage pockets Break Removable inside cushion Extra bike hitch available for purchase. Search “Booyah Bike Hitch” Optional organizer cup holder. Search “Booyah SINGLE organizer.Comes with everything to use as a stroller and a trailer. Not an option purchase like the competition.