Tires are one of the most important components that determine the car road holding performance.  If you want to begin tuning your car by changing your old tires with  40-45  for a good look. If you can't afford to buy, your choice must be a maximum of 55. With good tires you combine good looks, good grip and high-speed driving. In generally, the higher a tire's speed rating, the better it's resistance to heat. You have better traction and stability and thus will have enhanced ability accelerate and brake. Speed ratings give a general ideaof a tire's overall performance characteristics, high speed tires.  Tuning-masini.uv.ro