Tandem Topper's pivot assist loading system allows true one-person loading and unloading of your tandem or LWB recumbent every time. You can also remove rear portion of rack to use it as roof top rack for a single bicycle. Atoc's pioneering pivot system offers unmatched ease of use, versatility and quality. Easy to install Easy to use Easy on you and your bike Highest quality - made in the USA Pivoting fork mount system Easy, fast one person loading and unloading Takes less than one minute No finicky adjustments or tricky latches Incredibly simple Attention - you have to have your own base rack/roof rails. Has mounting hardware for Audi roof bars with channel. You will likely need additional mounting hardware to secure to your particular vehicles roof rails.