The specialty bike rack offers a fresh, unique way to easily carry up to four bikes on the back of your vehicle. This rack has a new 2 x 2 design, which separates the racks for use as a double or quadruple bike carrier, and can accommodate bikes of all sizes and frames. Exclusive to the BikeWing is the Zero-G™ attachment system, which securely holds your bikes in place without any frame-to-rack contact. It attaches to your bike tire instead, significantly reducing the chance of accidental dings and scratches to the bike frames. This bike carrier features a "Tilt & Fold Design" that allows you to access the rear of your vehicle without having to remove and re-install the carrier, even when your bike is still secure in the carrier. When not in use, this carrier folds flat against the rear of your vehicle for added convenience.