CyclingDeal Bike Bicycle Double Wheel Bag Foam Padded for Road Bike 700c MTB 26" 27.5" 29" Wheel Set - Nylon 600D with PU Coating - 82 * 12cm with Shoulder Strap and Handles ...

The fairings do add 2 lb (907 g) to the weight of the bike, although Garth maintains that the improvement in aerodynamics is well worth it. And yes, full wheel covers and disc wheels do already exist.