We bought this cover for a cross country trip in the winter, though we had the wrong type of bike rack, we have a hitch mounted one, it worked relatively well. After some experimentation we found if we turned it upsidedown with the zippers meeting on the bottom and tied them together with some wire it covered our 2 bikes well. We have electric assist bikes that are on a hybrid frame and the bike cover completely covered both bikes. We did bungee the cover over the top and around the bikes and I think that helped with the wind issue. Though we did not make it across country, due to car problems, the bikes came thru in perfect condition in spite of the snow and slush. For the price this is a great deal!!