well the stock 16" have tires with a 55 sidewall height and these have a 45 sidewall height. When you turn the side of the tire flexs from the weight tranfer. With less sidewall to flex it gives the car better handling. Also tires with very stiff sidewalls give the car more direct and percise steering a good example is the Evo. The stock advans on it had super stiff sidewalls you point the wheel the car is already there.