The VELOSOCK Bike Cover for car racks is compatible with the majority of rear car bike racks thanks to the several thoughtfully placed openings on the sides and in the bottom. The openings give access to the bike's frame and tires so that you can secure it to the rack in different ways. Please also make sure that your bike does not exceed the height of your vehicle as parts outside the turbulence zone may create aerodynamic drag.  Although our Bike Covers for car racks are compatible with most rear car bike racks, we strongly recommend using 3-point fixation rear car bike racks as in the picture Here are the most popular types of rear car bike racks that work well with VELOSOCK