With this bike trailer from Aosom, the durable bag will keep all the contents safe and protected, with its bright yellow top making it visible to everyone. The solid steel base attaches to your bike easily, and gives the carry bag a balanced and safe platform. It features two wheels for smooth movement when in motion, with reflectors on both for safety in the dark. Both wheels are detachable, so you can pack and store this trailer easily. Simply attach to your bike back and go!