The 2006.5 Kia Optima is a smooth, capable, communicative machine. The optional 17-inch tires grip well, but the Optima does push wide in turns, and the rubber isn’t shy about announcing its limitations. The suspension soaks up road anomalies like a good European sports sedan, swallowing bumps, dips, and potholes with equal aplomb. The driver always knows what’s happening at the road surface tactilely and aurally, but the communication is rarely intrusive. The Optima’s brake pedal feels terrific underfoot, letting the driver dial in just-right amounts of pressure to the pads, and the steering is responsive with perfect assist levels.