SturdyThis bike carrier rack is made of strong aluminum alloy structure, it supports up to 9kg (20lbs) cargo. Large-capacityThe bicycle rear rack is very suitable for long-distance riding and short-distance travel, and can accommodate many daily necessities. Fits most bicycle sizes. AdjustableAttached to the bicycle seatpost, the adjustable mounting rod extends backward/forward according to your needs.It fit different bikes, retracted for easy storage. Simple and Generous Design: It does not require supports on both sides as support. The height is moderate, the objects will not be scratched on the wheels, which will affect the driving. Simple Installation: Easy to install with the included rubber pad and L wrench.Allow you to transport your cargo with ease and efficiency, perfect for use with panniers, backpacks, baskets, etc. Note As different bicycles of seat post is not the same size and installation angle, please use the pads when you install it. And please install firmly without any loose and then load your package. Due to the loading of the cargo, put in different position of the scaffold, leading to stress points. Due to the different pressure, so it is best not to over or close to the Maximum Load Weight 22lb. During installation of goods or package, please do it gently to avoid uneven force causing goods fall or bike fell down. T