Superkarts stop as well as they go, thanks to disc brakes front and rear. (Frankel fabricates Lawson's rotors out of an aluminum-based metal matrix compound to save weight.) They also generate oodles of mechanical grip through wide, treadless tires. Aerodynamically, though, superkarts are relatively primitive, because the drivers must punch a huge hole in the air. (Sure, you can run fully enveloping bodywork, and some racers have, but that's problematic too--"It stiffens the chassis too much," says Paul Owens.) Still, superkarts are very sensitive to aero tuning. The standard practice is to adjust the nose of the kart, lowering the ride height to increase downforce, and balance the aerodynamics by trimming the angle of the rear wing.