> > Pardon my ignorance... > > I know that the last number in the tire description is the width, but what > are the first two? (225/40) > > Thanks the 225 stands for tire width, in millimeters, while the 40 stands for aspect ratio. Aspect ratio is the height of the sidewall as a percentage of the width. So the 40 stands for 40% of 225 which is 90 mm. Ramana