For those long-distance cycling trips, Radical Design’s Cyclone IV Trekking is just the cargo trailer for you. This award winning trailer has a number of great features. It quickly and securely attaches to your bike, can easily be converted to a hand trolley, and by removing the tow bar and wheels, you can attach a shoulder strap and carry it as a large duffel bag. It has a humongous amount of storage and a weight capacity of 88 pounds. Available in two sizes: one for bikes with a 16-20 inch rear wheel and one for bikes with a 26-29 inch rear wheel.