I bought the truck in March 2004. I Just toook a closer look at the spare today and noticed that its a P235 70 R16 Continental SUV 104T The four wheels on the ground are 235 75 R15 I would like to trade the spare tire and wheel for a 235 75R15 tire and wheel so as to have it match the others. I suppose I could go back to the dealer, but I prefer not to see those people again. I should have looked over the truck more carefully when I picked it up.... Anyway, the ...R16 spare appears to be new.