2008 Pontiac G5 Tires Base P205-55R16 89H Hankook Optimo (H725A) GT P205-50R17 90H XL Pirelli P6 Four Seasons Post navigationPrevious post: Best 2007 Pontiac G5 Tires & Tire SizeNext post: Best 2009 Pontiac G5 Tires & Tire Size