Would it screw up the vehicle dynamics that much to swap the 50 series tires for a better quality 55 series? Like Toyo Proxes, maybe? I put them on my current Maxima SE and I love them. I think the 55's would take out some of the harshness in the ride; and look better, too- filling up the wheel-well nicely. What do people think?

 

You can use this wheel/tire calculator to see how tire/wheel size changes will impact things
http://www.venommotorsports.com/howt...ldiameters.htm