Black Pet Bike Trailer Dog Stroller Cat Carrier Bicycle 600D polyester, UV-resistant, water repellent, washable fabric Aerodynamic 19" rear tire, the front tire is 12" air tire if used as Optional Jogger Kit(Extra $40) is not included and convert to jogger stroller is easy and tool free. Cargo size is 29"(L) x 22"(W) and 24"(H) Weight Limit: 55 LBS