We are now in the second year of competing with our Kit car, and are about to build an more aerodynamic cover for our vehicle out of a aluminium frame and some shrink wrap that has been scrounged form a local boat transporting company. We are having a discussion at school and want to know whether it would be better to try and cover all the wheels, cover just the back wheels, or don't cover the wheels at all. All of our wheels have HIPS wheel discs on them and we will be looking for a teardrop type shape for the vehicle body. In the tests on simple computer models it appears we will not be gaining much by encasing the wheel, just a bit of a headache on the construction front. In my humble opinion we would be better having a smooth sleek body shape that lets the air flow round and off the back. If we cover the wheels we will be making the body shape too wide for the air to flow comfortably off the rear of the vehicle. Any advice would be very much appreciated.