Bring the dog along for the ride with a 2-in-1 cart that tows behind a bicycle and converts into a pet stroller the moment the ride ends. A folding tow bar handles the switch in seconds, so one cart covers both biking and walking instead of two separate purchases. The hitch is a universal bicycle coupler sized to fit mountain road and casual bikes, and the tow arm holds the cabin tracking squarely behind the rear wheel. Ride quality comes from 19-in air-filled rear tires that roll over cracks and gravel without jolting the cabin, paired with a 7.5-in front caster wheel that swivels for tight turns and easy directional control once the trailer is pushed on foot. A powder-coated metal frame supports pets up to 176 lbs, and the 63-in by 28-in by 43-in cabin stays square under that load. A built-in safety leash clips to the collar so the pet stays inside during starts and stops, while reflectors and a raised safety flag keep the cart visible to traffic. The cabin is wrapped in 600D Oxford fabric chosen for tear resistance over long-term use. Breathable mesh windows keep air moving through the cabin, and a transparent PVC rain cover snaps over the opening to block rain while leaving the view clear. A soft grip handle gives steady control when walking. Between outings the frame collapses flat and the tow bar folds in, so the 28-lb cart stows in a car trunk or a small space without taking over the room. Assembly is required and an instruction sheet is included.