I know that the altima comes with H rated tires but how much speed is that able to handle? I know that the tire size that is recommended by the factory only comes in H and V ratings, the factory H rated tires are way too soft I almost got pulled over because I skirted infront of a cop, if I didn't know the guy he would have pulled my ass over!!! any ideas of how to not calibrate the speedometer and get some better tires?