Thanks Mark for bringing up tire weights. The Goodyears F1 GS D3 weighs in at 25 pounds S-03's weigh 25 pounds Michellin Pilot Sport 21 pounds(no wonder they're so expensive) Those three according to Tirerack. and according to the Toyo website; the T1-S is 21.9 pounds. All of those weights are for 225/45R17's.