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I neeed new tires. My G37s sedan has the stock 18s. I hear of folks putting 275s on the back.
What would the proper sizes be if I went with the 275s? Do I need to change the height, fronts....etc.
Many thanks.
You want to keep your new tire diameters within 3% or less of your stock size (to keep your speedo accurate), and the fronts should be as close as possible to the rear diameters (for ABS & traction control functions). Here's a good link to check sizing~ Tire Size Calculator - tire & wheel plus sizing