And Porter Cargo Bike Trailer, Tow Behind, Not For Kids Red/Grey Day Tripper. Take along your gear for the ride with the Day Tripper Cargo Trailer. The wide frame provides large towing and storage capacity, while the two-wheel design limits torque placed on your bicycle for unhindered performance. A unique folding-frame design and quick-release wheels pack up neatly for compact storage and transport. For added versitility, enjoy the ease of one-time installation with the universal coupler that easily attaches to almost any bicycle.16-inch air-filled tires with molded rims provide a ride that's always smooth, while interior D-rings allow you to strap down your cargo, providing extra security and improved performance.