Sunlite gives you 2 carriers in one with their Convertible Trailer Tot. This adjustable 2-child carrier hauls up to 100 pounds and attaches to your bike's rear axle quickly and easily. When it's time to get off the bike, it simply transforms into a 3-wheeled jogger. It's perfect for fast parents on the go. The 20-inch rear wheels rolls quickly while the 16-inch front gives you great maneuverability. The cover is screened in to keep out bugs and debris and features a clear plastic rain shield. Nice details like reflective accents add safety, too.