BikeSmart iRack DX
BikeSmart's iRack DX is an easy and fast way to add significant carrying capacity to any bicycle. It simply attaches to your seatpost with its quick-release clamp so you can install and remove it easily whenever you like. It's made of light and durable tubular 6061 aluminum and fits most seatpost diameter sizes. You can also adjust the top platform's position along the rack.
Weight limit: 22 lbs.