[Author Prev][Author Next][Thread Prev][Thread Next][Author Index][Thread Index]

Re: 17 inch tire size for A4

> 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.