I made some comparative measurements to my stock 01' and Goodyears and my 03' and Nitto 555R2's today. The front 01' and SC combo weighed in at 45lbs each, the 03' mounted with Nittos weighed in at 44lbs each. 2lb savings total for the front. The rear 01' SC combo weighed 49lbs, and the 03' Nitto combo came in at 48.5lbs. 1lb savings total for the rear. I know the 02'-04' wheels are lighter but my intent is to show the actual mounted weight of the wheel and tire together. The 275/40/17 front Nitto is 1/8th inch wider than stock and the 305/35/18 is 1/4 inch wider. The Nittos are much better (not perfect) in first gear, and actually hook in second and third. With the Supercars first was useless and they even spun hard in third. Since they aren't runflats the Nittos ride so much better and are like night and day for road noise. If you don't have Nitto 555R2's yet you gotta get em'!!!